# Book Bolt

Book Bolt is a subscription app that combines niche research with a KDP-sized cover and interior designer for low-content and puzzle books.

- Canonical page: https://kdp123.com/t/book-bolt/
- Official site: https://bookbolt.io
- Categories: Book & Niche Research, Low-content & Puzzle Books
- Price: From $23.99/mo (Pro $23.99/mo monthly or $19.99/mo billed annually (1,000 AI credits/mo); Premium $35.99/mo monthly or $29.99/mo billed annually (4,000 AI credits/mo). 3-day free trial. Refunds after a charge are reviewed case by case.)
- Platforms: web, chrome-extension
- Outputs KDP-ready files: Yes
- Touches your KDP account: No
- Official Amazon product: No
- Last checked: 2026-11-09

## Summary

Book Bolt puts product and keyword research, a cover and interior studio, puzzle generators, AI credits and the KDP Spy browser extension under one login. The cover designer sizes trim, bleed and spine to KDP specs from your page count. Its tools center on journals, planners, puzzle, coloring and activity books. It does not need access to your KDP account; you upload the finished files yourself.

## Pros

- Research and design in one place
- Puzzle generators for sudoku, mazes, word search and crosswords

## Cons

- The trial lasts only three days
- AI credits are capped per month

## Alternatives

- [Self Publishing Titans](https://kdp123.com/t/self-publishing-titans/)
- [KDP Coloring Book Studio](https://kdp123.com/t/kdp-coloring-book-studio/)
- [Publisher Rocket](https://kdp123.com/t/publisher-rocket/)

## Sources

- https://bookbolt.io/
- https://bookbolt.io/pricing/