The Series

Codeword Challenge

No clues. Every letter of the alphabet is hidden behind a number, and the same number always means the same letter. Five letters to start. The rest is pure logic.

12W
1A
18R
7G
18R
1A
14N
20T

Same number, same letter — every time.

The Format

How a Codeword Works

If you have never solved one, it takes about two minutes to learn — and then it is hard to stop.

STEP ONE

Every square holds a number

The grid is already filled — not with letters, but with the numbers 1 to 26. Each number stands for one letter of the alphabet, the same one every time it appears.

STEP TWO

Five letters are given

Write them into the alphabet tracker at the bottom of the page, then fill every matching square in the grid. Short words start falling into place immediately.

STEP THREE

Reason, never guess

A number that appears constantly is probably E or T. One that appears once is likely J, Q, X or Z. Every grid in the book has been machine-verified to have exactly one solution.

STEP FOUR

Learn as you finish

Each solution page lists every word in the grid with a short explanation — so a finished puzzle leaves you knowing something you didn't before.

50 Themed Codewords

Every word in every grid belongs to the book's subject.

Large Print

Generous squares and a clear alphabet tracker on every page.

One Solution, Verified

Each grid checked against a 73,000-word dictionary. No guessing.

Explained Answers

Solution pages define every word — history, not just letters.

The Collection

Books in the Series

Each volume stands alone — no need to start anywhere in particular. New subjects added regularly.

New
Civil War Codeword Challenge cover
Codeword Challenge
Civil War
Generals, Battles & the Home Front

Fifty coded grids drawn entirely from the Civil War — commanders and privates, Antietam and Appomattox, camp rations, field hospitals and the telegraph wire. Crack the code and the history comes with it.

50 CodewordsLarge PrintAll 26 LettersExplained Answers
Coming Soon
New
The Space Race Codeword Challenge cover
Codeword Challenge
The Space Race
Sputnik, Apollo & the Walk on the Moon

Fifty coded grids drawn from the race to the Moon — Sputnik and Explorer, Mercury and Gemini, the countdowns and the splashdowns, Gagarin and Armstrong. Every grid in this volume uses all twenty-six letters.

50 CodewordsLarge PrintAll 26 LettersExplained Answers
Coming Soon

Prefer clues?

Our Crossword Challenge series covers eleven subjects — the Civil War, classic cars, national parks, the Old West and more — with fifty themed puzzles in every volume.

Browse the Crosswords →
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