Two months of building, one honest comparison: Puzzle Creator Pro vs Book Bolt

A side-by-side breakdown of two KDP puzzle book generators — including the parts that don't flatter my own product.

A KDP YouTuber I'd reached out to said something that stuck with me:

"The puzzles aren't as good as Book Bolt."

I was building Puzzle Creator Pro at the time and his feedback was the kind I needed but didn't want. Book Bolt is the market leader. It does around 89,000 monthly unique visits, it's been around for years, and most serious KDP puzzle book publishers use it as their default.

So I bought a Book Bolt subscription. I built the exact same book in both tools. And I put them side by side, page by page, to actually see where the gaps were.

Here's what I found — including the parts that don't flatter my own product.

The quick context

Book Bolt is essentially "Canva for KDP books." You build your book page-by-page in their editor, dropping puzzles into specific page positions and customising each one individually. It's flexible. It's also slow — a 100-page book takes hours of layout work.

Puzzle Creator Pro is the opposite philosophy. You pick a puzzle type, difficulty, and quantity, then click Generate. A 100-page Sudoku book takes about 5 minutes from start to finished PDF. Every puzzle is also locked to your account — the repository is per-user, not shared across all customers like most generators.

These are genuinely different products with different audiences. So let's see how the actual output compares.

Sudoku — a draw

Generated the same difficulty Sudoku in both tools. Numbers, 9x9 grid, classic format.

Verdict: Visually almost identical. Both tools produce clean, readable Sudoku grids. Both centre the numbers properly, both use sensible box-borders at the 3x3 boundaries, both work for KDP. No meaningful difference here.

Winner: Neither.

Word Search — different philosophies

Both tools generated word searches with the same letter grid concept, but the workflow is very different.

Book Bolt requires you to upload a CSV of words. They handle the grid layout but you supply the content. This gives total flexibility — you can make a word search on any topic — but it requires you to source your own words for every book.

Puzzle Creator Pro generates from pre-built category wordlists (20+ categories: Animals, Travel, Cooking, Science, etc.) so you don't have to think about content at all. Pro users can also use AI Custom mode to generate from any topic, and there's now a "Bring Your Own Wordlist" mode for everyone else.

Verdict: Different design philosophies, both valid. PCP is faster for common categories; Book Bolt was previously more flexible for unusual topics, but the new BYO Wordlist mode closes that gap.

Winner: Neither — depends on your workflow.

Crossword — Puzzle Creator Pro wins clearly

This is where the comparison gets genuinely interesting.

Book Bolt's crossword renders with outline-only blocked cells (no filled black squares) and italic clue text below. It looks more like a school worksheet than a newspaper puzzle. The visual density is sparse — lots of white space, hard-to-read clue numbers, and an overall "unfinished" feel.

Puzzle Creator Pro renders the classic newspaper-style crossword with proper filled-black blocked cells, serif typography (Merriweather), small clear clue numbers in the cell corners, and a properly formatted two-column ACROSS/DOWN layout below.

If you saw these two books side-by-side on Amazon, you'd buy the PCP version. The crossword is the most demanding puzzle type to render well — it's where typography and layout discipline actually matters — and the visual gap is significant.

Winner: Puzzle Creator Pro.

Cryptogram — Puzzle Creator Pro wins

Book Bolt's cryptogram uses a fill-in-the-blank style — encoded text shown above, blank lines below for the solver to write the decoded letters. It's compact but functional.

Puzzle Creator Pro uses individual cipher boxes with the encoded letter above each box and an answer space below. It also includes a built-in A–Z reference grid at the bottom of each puzzle showing which letters have been revealed — a feature Book Bolt doesn't have. The solution page shows the decoded answer cleanly with the full quote printed underneath.

The PCP version is more visually structured and easier for solvers to track their progress. It's the difference between "this works" and "this is a polished puzzle book."

Winner: Puzzle Creator Pro.

Maze — Book Bolt wins on catalogue depth

This was the puzzle type the YouTuber specifically called out.

The individual maze quality is similar — both render as standard square mazes with thin walls. Neither is particularly distinguished as a single image.

But Book Bolt has Rectangular, Circular, Hexagonal, Honeycomb, Circular Triangular Lattice, 3D Standard, and 3D Round maze variants. Puzzle Creator Pro currently only does Rectangular.

For KDP publishers building maze book catalogues, that variety matters. "100 Hexagonal Mazes for Adults" is a real niche; "Circular Maze Challenge Book" is a real niche. Having only one maze shape limits the catalogue diversity you can build.

This is a legitimate gap. Circular and Hexagonal mazes are next on the PCP roadmap.

Winner: Book Bolt — on catalogue, not output quality.

Puzzle types Book Bolt has that PCP doesn't (yet)

Three more catalogue gaps worth being honest about:

• Kakuro — Japanese number crossword

• Nurikabe — logic grid puzzle

• Numbers Search — digit-finding variant of word search

• Word Scramble — anagram-style

All on the roadmap. None are particularly demanding to build algorithmically — they'll ship in the coming weeks.

Puzzle types PCP has that Book Bolt doesn't

A few of my own:

• Codeword Grid — crossword-style numbered grid puzzle

• AI Custom Word Search — generate from any topic via AI

• AI Custom Codeword — build cryptic puzzles from any quote

• AI Custom Cryptogram — same, for cryptograms

• Samurai Sudoku — 5-grid overlapping Sudoku for Pro users

Customisation — Book Bolt wins on depth, PCP wins on usability

Book Bolt has more granular controls per puzzle: line widths in tenths of a point, font choices from a list of 30+, separator line styles, cell colour pickers, and so on.

Puzzle Creator Pro has the essentials:

• Four font choices (Open Sans, Source Sans, Merriweather, JetBrains Mono)

• Three line thickness presets (Thin / Medium / Thick)

• Custom title text with placeholder substitution ([number], [difficulty], [size])

• Per-user defaults that auto-apply

The Book Bolt approach gives more power; the PCP approach gives less to think about. Different audiences will prefer different ends of that spectrum. For someone publishing their 50th book, Book Bolt's depth is useful. For someone publishing their first, PCP's restraint is friendlier.

Winner: Depends on user type.

The things that don't show up in screenshots

Three Puzzle Creator Pro advantages that aren't visible from the PDF output but matter enormously:

1. Speed

A 100-page Sudoku book in PCP takes about 5 minutes from start to download. The same book in Book Bolt takes 1–2 hours of manual page-by-page assembly. If you're building a catalogue of 50+ books for KDP, this difference compounds dramatically.

2. Unique puzzles per user

Book Bolt generates from a shared puzzle pool — meaning everyone using their Sudoku tool draws from the same underlying engine. Puzzle Creator Pro maintains a per-user repository: what you generate is locked to your account and won't appear in any other publisher's book.

This matters because Amazon's duplicate content detection actively penalises books with identical puzzles to other listings.

3. CMYK export by default

Both tools now offer CMYK output for paperback printing, with embedded fonts to avoid KDP's font warnings. PCP makes this a one-click toggle; Book Bolt has it in a more buried settings menu.

The bottom line

Book Bolt is genuinely better at three things:

• Maze variety

• Breadth of puzzle types in the catalogue

• Depth of styling customisation

Puzzle Creator Pro is genuinely better at four things:

• Crossword output

• Cryptogram output

• Speed of book generation

• Uniqueness of generated puzzles per user

The right tool depends on what kind of KDP publisher you are.

If you're building 100+ books over the next year and need to move fast, the uniqueness guarantee + bulk speed of PCP is the deciding factor.

If you're carefully crafting individual high-quality books and need every styling option available, Book Bolt's depth wins.

If you're new to KDP puzzle book publishing entirely: PCP's faster workflow gets you to your first book quicker, while Book Bolt's flexibility gives you more options once you know what you want.

I'm biased — I built one of these tools. But I genuinely think the honest answer is that neither tool is universally better. They're optimised for different workflows.

Try them both

If you want to try Puzzle Creator Pro, there's a $1 / 3 day trial at puzzlecreatorpro.com.

If you want to try Book Bolt, it's at bookbolt.io. (No affiliate link — that's just where they are.)

Try both. Pick the one whose workflow fits yours.

— Damian Founder, Puzzle Creator Pro