This collection investigates the limits of linguistic dexterity and lateral thinking through the medium of high-difficulty, jumbo-sized cryptic crosswords. Compiled by The Times' Crossword Editor Richard Browne, the volume presents a series of complex puzzles designed to test the analytical capabilities of experienced solvers. The work functions as a structured training manual for those seeking to master the specific conventions and cryptic clues characteristic of British-style crossword puzzles.

The material suggests a high level of difficulty intended for seasoned solvers familiar with the specific nuances of cryptic clue syntax. The focus on larger grid formats indicates a requirement for sustained concentration and advanced vocabulary application.