Prices are checked against each store and labelled with when.
It checks today's price at every store, compares the alternatives and answers in about a minute.
A logic puzzle book built around a single case: about 11,000 suspect names and 23 clues, each true, that let you eliminate names until one remains. It is pure deduction, not a narrative mystery or a word puzzle, so progress depends on patience and careful cross-referencing rather than guessing. The book also includes detective quotes, note pages and a journal for recording theories. It suits puzzle fans who enjoy long, methodical elimination work; anyone wanting a quick story-driven whodunit will find it slow.
In stock
Also available at
This is a detective logic puzzle book built around one case. Among approximately 11,000 suspects, only one is guilty. You use 23 clues to eliminate the innocent suspects one by one until a single name remains.
Every clue is true, and the case has one unique solution. The puzzle is rated medium to hard and is written for adults. It relies on observation, deduction and logical reasoning rather than guesswork.
After the case, the book includes funny armchair detective quotes, investigation note pages and a detective journal. The journal pages are for recording your own theories, observations and future cases.
