This book presents a collection of challenging crossword puzzles designed to test the solver's wit and knowledge. Curated by Will Shortz, a renowned crossword puzzle editor, the collection aims to provide a stimulating mental workout. The puzzles are intended for experienced solvers seeking a more difficult challenge than typical daily crosswords.

The collection is positioned as a demanding set of puzzles for seasoned solvers, indicated by the title 'The Dangerous Book of Crosswords' and the curation by Will Shortz. The emphasis is on difficulty and the mental engagement required to solve them, suggesting a target audience of individuals who regularly engage with and enjoy complex word puzzles.