
DI Nikki Galena
crime fiction
Series · mystery
The Dave Gurney series by John Verdon has 8 books and is best read in publication order, starting with Think of a Number (2010). The next book, Ghost Barn, is due 15 September 2026.
Start here: Think of a Number (2010) — then read straight through in publication order.
The order the books were released — the default way to read the series.
Dave Gurney is a retired NYPD homicide detective -- one of the department's most celebrated, with an unmatched closure record -- who moves with his wife Madeleine to a farmhouse in rural upstate New York expecting a quiet retirement, and instead keeps getting pulled back into puzzle-box murder investigations that only his particular gift for pattern recognition can unravel. John Verdon launched the series in 2010 with Think of a Number, in which a stranger mails Gurney's old acquaintance a letter correctly predicting the number he'll silently choose -- a piece of impossible-seeming misdirection that turns out to be the signature of a serial killer playing an elaborate game.
Verdon writes fair-play puzzle mysteries in the classic sense: every clue the reader needs is on the page, and the pleasure is in watching Gurney's forensic, detail-obsessed mind work through a killer's elaborate scheme before the reveal. The tension between Gurney's compulsion to keep investigating and Madeleine's wish for him to actually retire runs through the whole series as a quieter counter-thread to the increasingly baroque murder plots. Verdon came to crime fiction late, after a career in New York advertising and a decade building Shaker-style furniture, and set the entire series in the Catskills landscape where he and his wife settled.
Eight novels have been published, from Think of a Number (2010) through The Viper (2023). A ninth, Ghost Barn, is scheduled for September 2026.
Publication order. Think of a Number is the correct starting point; Gurney's circumstances and relationships develop continuously from book to book.
Not exactly -- Gurney is retired for most of the series and often works cases informally or as a consultant, and the books lean toward classic fair-play puzzle mysteries rather than procedural detail.
Not quite -- Ghost Barn, announced for a September 2026 release, is being marketed as the series' concluding novel.
Reading order last verified .