This collection serves as a curated repository of challenging crossword puzzles originally published in The Sunday Times, designed to test the vocabulary and lateral thinking skills of dedicated enthusiasts. The editors at Penguin UK compile these puzzles to provide a structured mental exercise for readers who enjoy cryptic and standard crossword formats. By aggregating previously published material, the book offers a comprehensive resource for those seeking to refine their puzzle-solving techniques through repeated practice and exposure to varied clue styles.

This volume is widely recognized by puzzle enthusiasts as a reliable source for high-quality, challenging content. Experts often note that the collection is best suited for intermediate to advanced solvers who are already familiar with the conventions of British-style cryptic crosswords.