This collection investigates the application of deductive logic through the medium of 200 number-placement puzzles designed to challenge and entertain. The author, Wayne Gould, a former High Court judge and the primary developer of the modern Su Doku format for The Times, utilizes his expertise in systematic reasoning to curate a progression of difficulty. The book serves as a structured training manual for players to sharpen their analytical skills without requiring advanced mathematical knowledge.

The book is regarded as a standard entry-level resource for enthusiasts seeking to engage with the mechanics of Su Doku as popularized by the author's work in The Times. The framing suggests a highly accessible, practical approach suitable for casual players and those looking to develop their logical problem-solving capabilities.