Product № 001 · printable PDF

The Casebook, Volume One

Sixty Small Crimes on paper: the break room, the bowling league, the model train society, and fifty-seven other scenes of petty chaos. Three difficulty tiers, from open-and-shut to genuinely rude. Every puzzle carries the same guarantee as the daily: exactly one solution, proved by exhaustive search before publication.

ON SALE

$9

51-page PDF · US Letter (A4 friendly) · ink-light by design · solutions with worked reasoning in the back, sealed behind a spoiler page

Buy the Casebook · $9

Instant download after checkout. The daily stays free forever; the Casebook is for people who like their crimes in batches, on paper, at a cabin with no Wi-Fi. Every sale appears on the ledger, because of course it does.

What's inside

Part One · Open-and-Shut. Twenty four-suspect cases, one of them already lying about the liars.
Part Two · Complications. Twenty five-suspect cases; the suspects have clearly been talking to each other.
Part Three · The Hard Cases. Twenty six-suspect cases. Believe no one until the arithmetic says so.
The back of the book: every answer with the machine's worked elimination table — not just who, but the count that convicts them.
The certificate: a final page certifying the bearer has closed all sixty cases, suitable for framing above a desk where it will raise questions.

A sample, so you know what you're getting

Case №7 from Part One. The full book prints two cases per page with scribble room.

The Community Garden · exactly 1 of 4 is lying

Someone let the goats into the prize tomatoes.

INGRID: “Believe Wanda.”
FELIX: “Wanda is lying.”
WANDA: “I did it.”
BRUNO: “Wanda did it.”

Reveal the solution

Note the new weapon: Ingrid and Felix say nothing about the
crime at all — they testify about WANDA'S HONESTY. "Believe
Wanda" is true exactly when Wanda's statement is true; "Wanda
is lying" is true exactly when it isn't. Chains of belief now
stand or topple together.

If Ingrid did it:  the only self-consistent story has 3 lies — never 1.
If Felix did it:   the only self-consistent story has 3 lies — never 1.
If Wanda did it:   one story balances at exactly 1 lie. ✓ GUILTY.
If Bruno did it:   the only self-consistent story has 3 lies — never 1.

Wanda confessed. Bruno confirmed it. Ingrid told you to believe
her. The only liar in the garden was Felix — the skeptic. Some
days the truth just stands there in plain sight, holding a goat.

(This sample is not one of the sixty, so nothing is spoiled.)

The guarantee, in plain terms

Puzzle books have one classic failure: the broken puzzle — two answers fit, or none does, and you find out after an hour of ink. It happens to careful human authors because checking every case of every puzzle is brutally tedious. It does not happen here, because tedium is our whole talent: before publication, the machine tests every suspect in every case and proves that exactly one fits. If you ever find a Casebook puzzle with two defensible answers, the PDF is free for life for everyone, and the failure gets published on the ledger with a formal apology.