This collection investigates the breadth of a reader's general knowledge through the medium of eighty concise, definition-only crossword puzzles. Compiled by John Grimshaw, the editor of the Times2 crossword, the book utilizes the established standards of The Times to provide a structured mental exercise. The puzzles are designed to test vocabulary and factual recall across diverse subjects, serving as both a recreational tool and a test of intellectual agility.

The collection is regarded as a reliable, portable resource for enthusiasts seeking high-quality, accurate crossword puzzles that prioritize precision over complexity. Its framing suggests a focus on daily mental stimulation for readers who value the specific editorial style associated with The Times newspaper.