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Upgrade 3 of 6 · You are about to publish many books. Here is the catch.

Standalone books make you start from zero every time.

Each standalone is a new launch: new readers, new reviews, no one waiting for it.

Series are how thriller and kids' horror authors keep readers: the end of book one sells book two. But a series written by AI drifts. Eye colours change, the dead come back, the clue from book one is forgotten in book three.

What Global Shelves leaves you withYou can now publish many standalone books in many markets. But standalones do not build readers: each book starts from zero and nobody is waiting for the next one.
What Series Engine addsTurn one book into a series that keeps its characters, timeline and promises straight.
The fix

Series Engine

Series Engine builds a series bible from your first book, then feeds it, plus a recap of every earlier book, into every chapter of the next one. It plans the next book from the last ending, writes a "Coming next" teaser chapter for the end of each book, and combines books into a box set.

✓ Series bible: characters, places, rules and open threads, built from book 1

✓ Continuity memory fed into every chapter of every later book

✓ Plan the next book from the previous ending in one click

✓ Series hooks: end-of-book teaser chapter and "also in this series" back matter

✓ Box-set builder: combine books into one manuscript (EPUB box set needs Publisher Pro)

Before you decide

What it does not do

  • Continuity is much better, not perfect. Read the recaps and fix the bible when something is wrong; the engine follows what you write there.
  • The EPUB box set needs Publisher Pro. Without it you get the box set as a text manuscript.

Skip it if you only plan to publish a book or two. The core app works fully without it, and you can come back to it later from the Upgrades page inside the app.

Upgrade 3 · one-time
$67 once
  • Series bible: characters, places, rules and open threads, built from book 1
  • Continuity memory fed into every chapter of every later book
  • Plan the next book from the previous ending in one click
  • Series hooks: end-of-book teaser chapter and "also in this series" back matter
  • Box-set builder: combine books into one manuscript (EPUB box set needs Publisher Pro)
  • Unlocks on the account you just bought. No new login.
Yes, add Series Engine No thanks, skip this upgrade

AI usage stays billed to your own OpenRouter key. This upgrade adds capabilities, not credits.

One-time payment of USD $67, plus any VAT or sales tax your country requires, shown at checkout before you pay. No subscription. Delivered by email within minutes. 30-day refund policy if it does not work as described. By purchasing you agree to the Terms, Privacy Policy and Refund Policy, and request immediate access to the digital product.

Questions

Can I turn a book I already wrote into book one?

Yes. Open the book, go to Export, and press "Start a series from this book".

Does it work for kids' spooky books?

Yes. Kids' series keep the monster rules, the friends and the town consistent, Goosebumps-style.

Can I buy this later?

Yes, from the Upgrades page inside the app. The price may differ from this page.