The free guidebook as an ebook, the email pop-up and welcome emails, and selling the guidebook on Amazon
Last updated: Saturday 17 October 2026, 7:55pm Pacific (wording only; the research is from Wednesday night, 14 October).
This page answers three sets of questions from Wednesday: how to send our free Longevity Guidebook as an ebook without it getting passed around, when the email sign-up pop-up should show and what the welcome emails should say, and how to price and set up the guidebook on Amazon. The short version is good news: our ebook file is already the right kind, the experts mostly back the plan for the pop-up and emails, and Claude can do about three quarters of the Amazon setup.
Where to answer: every choice on this page that's still open is in the brief's Questions for you, with the choices to tap and one Send button.
Added Thursday 15 October 2026, 7:14am Pacific: the guidebook rebuild finished at 12:20am Thursday: 374 pages in paperback, 375 in the free edition, no blank pages, and the copyright lines at the back. Read the free edition (PDF, 11 MB).
This was research only. Nothing live changed: the pop-up and welcome emails weren't touched, and nothing was set up or signed into on Amazon.
The guidebook as an ebook
We give the guidebook away free to people who join our email list. These answers cover which file to send, how to stop it being shared, and how people read it on a Kindle or an iPad.
Which ebook format is best?
Short answer: an EPUB that reflows to fit any screen, with a PDF as the backup for anyone who wants fixed pages. Ours is already that kind of EPUB (16.2 MB), so there's nothing to redo.
- An EPUB fits any screen, works on every Kindle device and app, and opens in Apple Books on iPad. A PDF keeps the design but is tiring to read on a Kindle's e-ink screen.
- Our file fits every size limit. Amazon's Send to Kindle takes up to 50 MB by email, and BookFunnel (a service that delivers ebooks to readers) takes up to 300 MB and suggests under 20 MB for email.
Can we skip blank pages and put the copyright page at the back?
Short answer: yes to both. Amazon requires no blank pages and no copyright page at the front, in the ebook or the paperback.
- With the copyright page at the back, Amazon's free sample (about the first 10% of the book) opens on real content.
- The rebuild on Wednesday night did both (page counts are in the paperback price answer below).
Can we send it in a protected format, so it can't just be passed around, and still have it read on Kindle and iPad?
Short answer: yes, though not with a lock. The locks that could protect a free file from our site (Adobe, Readium LCP, Locklizard) don't open on a Kindle.
The better route is BookFunnel ($200 a year), connected to Klaviyo, our email system. Only people on our list can download the book, and every copy carries their email address, so a leaked copy names whoever leaked it. It reads on every Kindle and on iPad, with no special app or account.
- On iPad, a locked file needs an extra app. A web reader, or Apple Books promo codes (250 codes per ebook), can't be read on a Kindle.
- Each EPUB carries a visible "Book made for {email}" line plus a hidden watermark, and each PDF has the email stamped on every page. BookFunnel's $200 plan covers up to 5,000 downloads a month.
- A watermark doesn't stop sharing. An EPUB passes around as easily as a PDF, so the stamp is what protects either one.
How a new subscriber gets it on a Kindle: they sign up on the pop-up, tap "Get your free guidebook" (on the thank-you step or in the first welcome email), type the same email on our BookFunnel page, and choose Kindle. On an Android phone, the BookFunnel app sends it straight to their Kindle.
Anywhere else, they upload it at amazon.com/sendtokindle, or approve their own address in Amazon's settings and forward BookFunnel's email to their @kindle.com address. It lands in their Kindle library in 5 to 10 minutes, on every device on that account.
On an iPad: the same first steps, then Apple Books. It opens in color and works offline, and anyone who wants fixed pages can take the stamped PDF.
Before launch: BookFunnel's help pages say EPUBs on restricted download pages are watermarked. We'd still test the PDF stamp, check that a brand-new subscriber passes the Klaviyo list check at once (double opt-in delays adding people), and do one run on a Kindle and one on an iPad.
Nothing gets set up until you and Nick say so.
Where the free ebook and Amazon meet: to keep giving the full book away free, the Kindle edition has to stay out of KDP Select (Amazon's exclusive program). Select's rule: "During the 90-day enrollment period, the Kindle eBook can only be distributed through KDP and public libraries."
Our site counts as distribution, and only a 10% sample is allowed anywhere else. Staying out of Select gives up Kindle Unlimited, free promotion days, Countdown Deals and the 70% royalty in Brazil, Japan, Mexico and India.
Keep Amazon's copy protection (DRM) on the Kindle edition, since buyers of unprotected Kindle books can now download them as EPUB or PDF. And keep the free copy on our own site only, since Amazon may match "a third party's price".
The choices (in the brief's Questions):
- The Kindle edition. Recommended: keep it out of KDP Select, with Amazon's copy protection on, so the full book stays our free gift. Other choices: join Select and shrink the free gift to a 10% sample or a separate short guide; or join Select for 90 days and start the free gift after.
- How the free guidebook goes out. Recommended: BookFunnel, $200 a year. Other choices: the plain PDF on our Shopify store, as now (free, unprotected); BooXtream, through a custom connection we'd build; or a web reader (can't be read on a Kindle).
- Which files people get. Recommended: the EPUB first, plus the email-stamped PDF. Other choice: the EPUB only.
- A confirmation email before the download. Recommended: no confirmation email, so there's one step fewer. Other choice: require it, so nobody can type in a friend's address.
Sources:
- KDP help, kdp.amazon.com/en_US/help/topic/ plus GD9PMU58BV24QFZ7 (Select), GDDXGH9VR22ACM8U (DRM), G201834260 (blank pages), G200634500 (price matching); bookfunnel.com/pricing; authors.bookfunnel.com/help/; authors.apple.com/support/4576
- Full research and a separate fact check, saved in the overnight research notes
The email pop-up and welcome emails
A panel of 15 outside experts (email marketers, usability researchers, a deliverability pair and ecommerce founders) answered five questions about how we sign people up from our Meta ad landing pages and what we send them next. The aim is more first orders from the people our ads bring in, without hurting the pages' sales.
These answers build on the setup chosen Wednesday evening: on the Meta ad landing pages, the pop-up offers only the free guidebook; on the rest of the site, it offers 15% off plus the free guidebook.
When should the pop-up show on the Meta ad landing pages, without hurting sales?
Short answer: not on a timer alone. Show it once the visitor scrolls past the top of the page into the proof, and no sooner than 12 seconds after they land (or the median time engaged visitors spend there, once we check it).
- A leading usability research firm: "never show a popup before users can glean value." On phones, a panel that slides in from the edge and never covers the price or the buy button.
- Say what the guidebook is, what it does for them, and how often emails come. When a well-known conversion expert's blog swapped "join my list" for a single free PDF guide, sign-ups "just skyrocketed, double, tripled" (2015).
- Judge it by new-customer sales per ad-page visitor, not by sign-ups. There's too little traffic for a split test, so we'd compare full weeks before and after.
- The pop-up is off on all 13 ad pages now, and stays off until you've reviewed it.
Where the experts landed: 2 agree (the two usability researchers), 2 disagree, and 11 had no opinion on timing. A checkout research firm would wait several minutes or skip the pop-up; an ecommerce founder would show it on arrival, plus a second pop-up when someone goes to leave.
The choice: recommended, show it after the visitor scrolls past the top, 12 seconds at the earliest. Other choices: 12 seconds after landing; on arrival plus a pop-up when someone goes to leave; or no pop-up, with the guidebook offered on the page itself.
Should each ad angle get its own welcome emails?
Each ad makes one main pitch (its angle), for example the lab test results or winter immunity. The question was whether the emails that follow a sign-up should carry on that pitch.
Short answer: not a whole series per angle. Split only the first two emails by where people signed up: ad page sign-ups get emails that carry on their ad's pitch, and site sign-ups get their own two, with no angle. After that, everyone gets the same series.
- That shared series is today's welcome emails 3 to 7, reworded so none mentions a code the person never got (the last question below covers sending ad page sign-ups a code later). Every version stops for anyone who buys, and nobody gets the first email twice.
- Angles with the same message share one set of emails.
Where the experts landed: 8 agree, 2 disagree in part, 5 had no opinion. The two email copywriters who disagree want the angle in every welcome email, not just the first two.
The choice: recommended, the angle in the first two emails only. Other choice: the angle in every welcome email.
What should the first welcome email lead with: the free guidebook, the ad's pitch, or both?
Short answer: both, for ad page sign-ups, which is what you leaned toward. The subject and first line name the guidebook and tie it to their ad's pitch, with one download button high up, a short block on why it matters to them, and no code.
Site sign-ups get the guidebook button first and the 15% code (OPUS15) just below it, stated plainly but not as the headline, with no angle.
- Both say what's coming next and how often. As one email specialist put it: "Whatever the popup offered, lead with it." Today's first email leads with the OPUS15 code and a featured product.
- Judge it on new-customer sales per sign-up, with guidebook downloads only as a check.
Where the experts landed: 9 agree, nobody disagrees, 6 had no opinion. On the site email, only one member (an email agency founder) would put the code first.
The choice (site sign-ups' first email): recommended, the guidebook first with the code just below. Other choice: the code first.
Should people who engage more get more emails?
The idea: send more to people who click, visit and shop, and less to people who don't, since Apple's Mail app hides who really opens emails.
Short answer: yes. Send more to people who engage and less to the quiet ones, judged on clicks, site visits, carts, orders and replies, never on opens.
We don't do this today. Only the abandoned-cart emails send more, to people who got further toward buying.
- The open-tracking problem is real: 94.8% of our September email opens came from an unknown email app or Gmail's privacy proxy, so opens can't be trusted.
- Today the welcome series sends people who haven't bought 7 emails over 13 days, and stops when someone orders. One quiet-subscriber series (2 emails, removes nobody) goes to people with no click, visit or order in 120 days. No campaign in the last 60 days was sent to an engaged-only group.
- A way to start: send the engaged group about 50% more for 4 to 6 weeks, keep going while unsubscribes stay under 0.5%, and stop at 0.7 to 1%. Those numbers come from one email agency founder, without a published source.
- An email researcher's tip: count unsubscribes separately for site and ad page sign-ups, since people who joined for 15% off may tire sooner.
Where the experts landed: 10 agree, nobody disagrees, 5 had no opinion. On daily emails they split: 4 for, with conditions (two email agency founders and two deliverability experts); 4 cautious or against (a retention expert, an email researcher and both usability research firms); and one ecommerce founder backs daily emails in a sign-up's first week.
The choice: recommended, send the engaged group more, with the stop rules above. Other choice: daily emails for every new sign-up's first 7 days.
Should an ad page sign-up who got only the guidebook, and hasn't bought, get the 15% code later?
This one came out of the pop-up setup itself: someone who signs up on an ad page gets the free guidebook but no discount code.
Short answer: yes, once: in welcome email 3 or 4 (day 3 or 5 after sign-up), only to people who haven't bought, with a reason for the offer and a real deadline. Never in the first email.
- An ecommerce founder (wait 2 or 3 days) and an email specialist (email 3 or 4) meet at email 3. Each welcome email already checks for an order, so buyers never get it.
- A real deadline needs a code that expires. All we know about OPUS15 is that it's one-time; whether it can expire still needs checking.
- There's no sales data on this, and a test can't settle it at our volume, so it's a judgment call, weighing the discount we'd give people who would have bought anyway.
Where the experts landed: 4 yes (two email specialists, an ecommerce founder and a direct-to-consumer growth advisor), 1 disagrees in part, 10 had no opinion. A customer retention expert would send the code only when someone's behavior points to price, since a shopper back on the same product page three times "may need proof more than they need 10% off". One of the yes votes would save it for a last call around day 10 to 13, to people who've stopped clicking or visiting.
The choice: recommended, send the code once, in email 3 or 4. Other choices: one last-call code around day 10 to 13; a code only when someone's behavior points to price; or no code for ad page sign-ups.
Sources:
- The panel's notes from both rounds (round 2 came after the Wednesday evening decision), each expert's answers, and a note on what our email does today, all saved in the overnight research notes
- Our email marketing knowledge base (welcome emails, sending calendar, sign-ups and list building) and our ecommerce knowledge base (sign-up capture, matching the ad's message); nngroup.com, baymard.com, Kohavi (2010), Laja (2015), Firestone on Omnisend (2026)
The guidebook on Amazon
We plan to sell the guidebook on Amazon as a paperback and a Kindle ebook, through KDP (Kindle Direct Publishing, Amazon's self-publishing service). These answers cover who does the setup, the prices and what each copy pays us.
How much of the Amazon setup can Claude do?
Short answer: about three quarters of it. You or Nick would do the parts tied to a person or that can't be undone: the sign-in and two-step codes, the tax interview, the bank account, any ID check, the free ISBN, ordering and approving the proof copy, and pressing Publish.
Nothing has been started, and nothing starts until you and Nick say so.
- Claude has written the paperback fill-in sheet and built draft files. The Kindle ebook sheet isn't written yet, and the final files waited on Wednesday night's rebuild (now done) and the ISBN.
- Once someone is signed in and you say go, Claude can type the book's details into KDP through your signed-in Chrome in the background, check every page in Amazon's previewers, and write the Author Central page and the book's ads.
- Yours to decide: the AI disclosure, prices, Expanded Distribution and KDP Select. KDP may also ask for proof we own the rights, since the book is free on our site.
The choice: recommended, you or Nick type it in from the fill-in sheet. Other choice: Claude types it in through your signed-in Chrome.
What should the paperback cost, and how many pages is it?
Short answer: $24.99, the price picked on 13 October. After the rebuild the paperback is 374 pages (6 x 9 inches, standard color), and at $24.99 each copy pays us $4.45.
- Amazon's print cost is $1.00 plus 2.55 cents a page: $10.54 at 374 pages. Amazon pays 60% of the list price, minus that print cost. Every 2 pages fewer adds about 5 cents a copy.
- At 374 pages, $27.99 pays $6.25 and $29.99 pays $7.45. Expanded Distribution (Amazon's wider print distribution, to bookstores and libraries) needs a price of $26.35 or more, so it stays off at $24.99.
- Before the rebuild, at 380 pages, the print cost was $10.69 and $24.99 paid $4.30.
- Comparable longevity books sell for about $11 to $20 in print (Greger's How Not to Age showed $27.38, unconfirmed), but most are black-and-white books that Amazon discounts; a KDP paperback normally sells at full list. Diamandis's Longevity Guidebook paperback lists at $15.99 for 236 pages.
The choice: recommended, $24.99. Other choices: $29.99 or $27.99.
What should the Kindle ebook cost?
Short answer: $9.99, which pays us about $5.29 a copy on Amazon's 70% royalty plan. $12.99, the top price on that plan, pays about $7.39.
- The 70% plan takes a delivery fee first, 15 cents per MB: about $2.43 for our 16.2 MB file.
- KDP charges on its own converted file, which can come out larger than our EPUB; getting down to 10 MB would mean visibly shrinking the pictures. At 20 MB, $9.99 would pay $4.89.
- $9.99 matches the Diamandis book and undercuts Outlive ($11.99). The ebook is free on our site anyway, and every Kindle copy puts our products in front of a reader who cares about longevity.
- On KDP Select, see the ebook section above.
The choice: recommended, $9.99. Other choices: $12.99; or $9.99 with the pictures shrunk to about 10 MB ($5.94 a copy), which looks visibly worse.
Can we give a free Kindle book with a first purchase of our supplements on Amazon?
Short answer: no. Amazon has no way to attach a free book to a purchase of our supplements, first-time or not.
The closest idea is a card in the box with a prepaid Kindle gift link. That's unconfirmed, so someone would need to ask Amazon Seller Support first.
- Amazon's promotions and bundles leave out books and ebooks, sellers never get buyers' emails, and messages to buyers can't offer free products.
- Gift links cost about $4.70 per copy someone actually redeems, unredeemed ones are refundable for 60 days, and buyer and recipient must be in the same country (G200652260). It's a grey area: "Kindle books and redemption links cannot be resold."
- A card sending buyers to our site breaks Amazon's rules on box inserts and puts the seller account at risk. Our social media handle on the packaging is allowed, as long as the box shows only the handle, with no word of the gift, the site or a discount (201972160).
The choice: recommended, nothing inside Amazon for now, and our social handle alone on the packaging. Other choices: ask Amazon Seller Support about gift links on a box card, then test it on one product; or a card pointing to our site (against Amazon's written rule).
Sources:
- KDP help, kdp.amazon.com/en_US/help/topic/ plus G201834340 (print cost), G201834330 (royalty), G200634560 and G200634500 (ebook price and delivery fee), G200652260 (gifting); kdp.amazon.com/en_US/select
- Seller Central help G60951 (promotions), G87HAE6PMKKM23Z7 (bundles), 201972160 (inserts), G1701 (buyer messages); amazon.com help GVWGP284MQ6ZRM59 (Kindle gifts); Amazon.com book search, 14 October
- Full research and a separate fact check, saved in the overnight research notes; the guidebook's Amazon fill-in sheet