Powerful Plugins

Back Matter Builder

The complete front and back matter pack for every book you publish: copyright page, review ask, signup page with a scannable QR code, also-by in reading order, and what's next, sized to your exact trim.

The last pages of your book are your best ad space. Most authors leave them blank.

Back Matter Builder is a Claude Cowork plugin that builds every page that belongs before and after your story: the copyright page, the author's note, the review ask, the signup page with a real scannable QR code for print, your also-by list in reading order, and the what's next page for your preorder.

Every page comes sized to your exact trim with margins from KDP's own gutter table, in your voice, in the order that actually converts readers into reviews, subscribers, and next-book sales.

And when your signup page needs something to promise, it writes the reader magnet too.

Sound familiar?

Your book just ends. A reader finishes, closes the app, and you never see them again.
You rebuild the same copyright page and also-by list from scratch, slightly differently, every single launch.
Your print books have no way to capture a reader, because nobody types a URL out of a paperback.
Your wide edition still says "leave a review on Amazon," and Apple noticed.

How Back Matter Builder works

Set up once

Pen name, signup link, backlist in reading order, default trim. Sixty seconds, saved forever, with separate profiles for every pen name you run.

Run the build

Give it the book, trim, and rough page count. Fiction mode or puzzle mode, Amazon and wide editions, print and ebook.

Drop the pages in

Every page arrives sized to your trim with the right margins for your page count, ready for Atticus, Vellum, or Word, QR codes included as print-ready files.

Keep the promise

If your signup page offers a bonus, the magnet builder writes it with you: a bonus epilogue or scene in your voice, or a bonus puzzle pack, plus the delivery page and welcome email.

What's in every pack

The converting order
Author's note, then review ask, then signup, then also-by, then what's next. That's the funnel readers walk at the end of a book, and every page hands intent to the next one.
Real QR codes for print
Generated as print-ready files, sized for a 300 dpi page, because nobody types a URL out of a paperback.
Amazon and wide editions, done right
The Amazon edition links to Amazon. The wide edition is retailer-neutral everywhere it needs to be, because wide stores punish books that advertise a competitor.
Exact trim sizing
Margins come from KDP's own gutter table for your page count, and it warns you when your new page total crosses a gutter boundary.
Puzzle mode
Solutions divider with formatter cross-references, a review ask in your book's voice, and a catalog page that sells the rest of your shelf.
The magnet builder
A finished bonus epilogue, other-POV scene, or prequel short in your voice, or a bonus puzzle pack blueprint, plus delivery page copy and the welcome email.

Questions, answered

Does it match my book's look?

It matches your book's specs: exact trim, margins from KDP's gutter table for your page count, one page per piece, so the pages drop into your interior file without reflowing.

Fonts and decorative styling stay in your formatter, where they belong.

I publish puzzle books, not fiction. Is this for me?

Yes, and it doesn't treat you like an afterthought. Puzzle mode builds the solutions divider with cross-reference notes for your formatter, a review ask that sounds like your book, a catalog page for your shelf, and a signup page promising a bonus puzzle pack it can help you build.

What if I don't have a newsletter yet?

The pack ships with a signup page variant that works without a magnet, and the moment you have a list, one command builds the bonus your page promises and upgrades the promise line.

Do I need anything special to run it?

Claude Cowork on a Claude Pro or higher plan. Everything runs right in the chat.