This collection investigates the intersection of Agatha Christie's extensive literary bibliography and the mechanics of crossword puzzle construction. Randall Toye, a dedicated researcher of Christie's work, utilizes the specific vocabulary, character names, and plot points found throughout the author's mystery novels to create a series of thematic challenges. The book serves as both a test of reader knowledge and a tribute to the intricate world-building of the Queen of Crime.

The subject matter points to a specialized collection intended for dedicated fans of classic mystery literature who enjoy testing their recall of Christie's canon. The framing suggests a lighthearted, supplementary volume that functions as a companion piece to the primary novels rather than a critical analysis.