This collection of cryptic crosswords aims to provide an exceptionally difficult mental challenge for experienced puzzlers. Edited by Richard Rogan, the Crossword Editor for The Times, this book compiles 50 jumbo-sized cryptic crosswords. These puzzles are designed with unique 23x23 grids, significantly larger than standard 15x15 grids, to test advanced word skills and cryptic logic.

This collection is presented as the ultimate challenge for seasoned cryptic crossword solvers, emphasizing its difficulty and the expertise behind its creation. The puzzles are specifically curated to push the limits of wordplay and logical deduction. The large grid size and the selection by The Times' Crossword Editor suggest a high standard of complexity and engagement for dedicated puzzlers.