Mysteries are different from other genres in that the author has a specific contract with the reader. This contract says, roughly:
1. Thou shalt provide the reader with the clues needed to solve the mystery, if the reader manages to look at the clues in the right way.
2. Thou shalt not conceal the one piece of information needed to identify the criminal.
3. Thou shalt not make the criminal easy to identify because that would be no fun at all.
4. Thou shalt not invent random crap like time travel to explain how the criminal managed to pull off the crime.

These restrictions can make mysteries rather formulaic, but great mystery writers rise above them. And occasionally, an author manages to pull off a tour de force that both respects the contract and rises above it. “Magpie Murders” by Anthony Horowitz is just that kind of mystery.

But before we get into the novel, let’s talk about the two basic genres of murder mystery: cozy and hardboiled. It’s actually more like two separate genres, because cozy readers often don’t like hardboiled mysteries, and vice versa. Agatha Christie is, of course, the great-grandmother of the cozy mystery with her English villages, eccentric detectives, crumpets and tea. Dashiell Hammett and Mickey Spillane epitomize the hardboiled mystery, with gritty, urban settings and down-at-heel, cynical detectives like Mike Hammer.

“Magpie Murders” is by definition a cozy and an English cozy at that. My favorite kind of mystery, in short. Don’t ask me why I am so enamored of vicars, fêtes and jumble sales—I just am. “But “Magpie Murders” is a cozy mystery within a cozy mystery, giving the happy reader not one but TWO mysteries to solve. The murders are unconnected except that the author of “Magpie Murders,” the book within the book, is also the victim in “Magpie Murders,” the novel.

Okay, that might have been a tad confusing so I’ll back up. The story opens with a book editor, Susan Ryeland, reading a manuscript. The manuscript, “Magpie Murders,” was written by Alan Conway, an enormously successful mystery writer and the mainstay of Susan’s employer, a small publishing firm. Susan warns the reader that the manuscript changed her life completely, and then we plunge into the story of “Magpie Murders.”

This story within a story is set in post-WWII England. An apparently accidental death occurs in Pie Hall, the residence of the local gentry, Sir Magnus Pie and his wife. But was it an accident? Small-town tongues are wagging. Then Sir Magnus is found dead in his front hall, decapitated by a sword from a nearby suit of armor. There are carloads of suspects, but nothing that makes any sense. Conway’s fictional detective, Atticus Pünt, is called in. Pünt appears to have solved the mystery—perhaps—by the time Susan Ryeland comes to the end of the manuscript. But the final chapters are missing. And then her boss gets a letter from Conway that sounds a great deal like a suicide note, and they discover he is dead, apparently having thrown himself off a high tower attached to his historic residence.

Susan begins investigating on her own because she needs to find the missing chapters—her publishing firm might not survive without bringing out Conway’s final book. She doesn’t find them, but does discover that someone has taken Conway’s notes and wiped all versions of the book on his computer. She begins to suspect that Conway was murdered. She also finds that there are several people who had excellent motives for murdering him, from his recently discarded lover to his next-door neighbor.

At this point, the reader is working on two murder mysteries, both taking place in English villages, and both involving assorted vicars, village residents, and mysterious visitors. Horowitz does a credible job of keeping the stories distinct. A lesser writer might have led the reader into an inextricable bog of confusion. I listened to the audiobook version, and splitting the narration between a man and a woman helped to keep the two stories straight. Samantha Bond narrated those portions told by Susan Ryeland, and Allan Cordune narrated the manuscript mystery. Both did an excellent job.

Eventually Susan solves the modern mystery and finds the missing pages. She nearly loses her life in the attempt, but then we get to read the end of the story-within-a-story. Both mysteries resolve satisfactorily and adhere strictly to the reader-author contract outlined above. I didn’t guess the solution to the manuscript mystery at all, and only sussed the modern mystery toward the end. Far from feeling frustrated by this, I am always happy when the author outsmarts me—as long as the author plays fair. “Magpie Murders” is one of the most enjoyable reads I’ve had in a while, and I will look for more mysteries by Anthony Horowitz.