Paperback · Logic-grid puzzle book
Frontier Logic, Volume One: The Cactus Flat Cases — 100 Western Mystery Logic Grid Puzzles for Adults, Book One.
This is a puzzle book, not a novel. There is no story to follow between cases and nothing to read for plot. Each case hands you a short scene in and around Cactus Flat, Arizona Territory, a cast of suspects, a list of clues, and a blank grid. You rule out what cannot be true until one arrangement is left standing. Every case has exactly one solution, and that solution is always reachable by deduction alone — never by guessing, and never by a twist withheld until the end.
The complete frontier
Each paperback contains 100 standalone western cases, complete answer keys, and standard and large-print editions.
Free every day
One western mystery, three columns of suspects, locations and evidence, and exactly one arrangement that survives the clues. It takes a few minutes, it needs no account, and nothing is saved anywhere but your own browser.
Inside the Book
No app, no companion download, no flipping back to a reference section. Each case is a self-contained spread you can work through with a pencil.
A few lines set the scene, then the suspects are listed with the detail that matters about each one — who is left-handed, who keeps the ledger, who owns half the tallyboard.
Every clue is a plain statement of fact. “You can rule out Silver Hollow for Tin-Star Tucker.” Nothing is figurative and nothing is a red herring in the fiction sense — each clue removes real possibilities.
Suspects run down the side; locations, evidence and motives run across the top. Cross out what a clue eliminates, circle what it confirms, and let the knock-on eliminations follow.
One arrangement survives. If you want to check it, or you are stuck and want one line of the answer rather than all of it, the complete key at the back has every case.
Difficulty
The book starts where a first logic grid should start and ends somewhere that will take you a while. You do not need any prior experience to open it at page one.
15
Smaller grids and fewer categories. These teach the notation itself: what an X means, what a circle means, and how one mark forces the next.
45
The main body of the book. Full-size grids where the clues no longer arrive in a convenient order and you have to choose where to start.
40
The hard end. Chains that run several steps deep before they pay off, and cases that need you to hold two possibilities open at once.
15 Rookie + 45 Seasoned + 40 Marshal = 100 cases
Choose an edition
The difference is the trim size and how big the grids and type are printed. Nothing is added or cut between them.
$16.99
The regular paperback, sized to sit in a bag or on a bedside table.
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$19.99
A bigger page, so the grid cells and clue text are printed larger. Worth it if you solve for long stretches or find small grids tiring.
Opens Amazon, who sell the book and set the final price.
Prices are the US list price at the time of writing. Amazon is the retailer.
If you want a hundred more
Each Frontier Logic volume collects 100 western mystery logic-grid puzzles, every one with exactly one solution and a complete answer key. Every volume stands alone, in standard and large print.
Opens Amazon, who sell the books and set the final price.
Before you buy
No. It is a physical paperback puzzle book of 100 logic-grid puzzles. The western setting is the dressing on the puzzles; there is no continuous plot, no chapters, and nothing to read for the story.
Yes — a complete answer key at the back covers all 100 cases, laid out so you can check one line without seeing the rest.
No. Every case has exactly one solution, and it can always be reached by deduction from the clues given. You never need to guess and then backtrack to find out whether you guessed correctly.
No. The 15 Rookie cases at the front exist for exactly this, and the book explains the notation before it asks you to use it.
The contents are identical. Choose the large print edition if you want bigger grid cells and larger type on an 8.5 × 11 in page; choose the standard 6 × 9 in edition if you would rather have the smaller, more portable book.
Yes. It is Volume One of Frontier Logic. Each volume stands alone — there is no order you have to read them in.