Formerly one of Scotland's top forensic scientists, fifty-ish Enzo Macleod—half-Scottish, half-Italian—now lives in France and teaches at the university in Toulouse, in this intriguing series from much-lauded novelist and television dramatist Peter May, creator of the Lewis trilogy. Having wagered he could crack a series of famously unsolved murders, Enzo finds that a lifetime spent in the lab hardly equips him for dealing with the real-world dangers he encounters.

Before his stunning Lewis trilogy, Peter May introduced us to forensic investigator Enzo Macleod. Divorced in Scotland and widowed in southwestern France, with an estranged Scottish daughter and a French daughter he has raised by himself, Enzo lets himself in for even more trouble when he recklessly bets he can solve the six notorious cold cases in a popular book by Paris journalist Roger Raffin. The first of these concerns a desperate man who sought sanctuary in a Paris church, then suddenly disappeared. To solve this riddle, Enzo will delve into the catacombs beneath the city, unearthing clues deliberately left behind by a killer who is not through yet.