THE BIGGEST MYSTERY CAN BE MURDER TO SOLVE . . . DISCOVER THE YEAR'S MOST ORIGINAL CRIME NOVEL
'One of the year's most entertaining crime novels' SUNDAY TIMES, CRIME BOOK OF THE MONTH
'When did you last read a genuinely original thriller? The wait is over' A. J. FINN
'An elegantly structured, intellectually challenging and completely unique thriller that grips like a vice' SOPHIE HANNAH
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All murder mysteries follow a simple set of rules.
In the 1930s, Grant McAllister, a mathematics professor turned author, worked them out, hiding their secrets in a book of crime stories.
Then Grant disappeared.
Julia Hart has finally tracked him down. She wants to know what happened to him.
But she's about to discover that a good mystery can be murder to solve . . .
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'One of the most creative detective novels of the year . . . If not of all time' Samantha Downing
'Intelligent and inventive . . . It's the most fun I've had in ages' Cathy Rentzenbrink
'So, so clever . . . Agatha Christie would take her hat off to this one - bravo!' Sarah Pinborough
**Winner of the Capital Crimes Reader Award for Debut Book of the Year**

SHORTLISTED FOR THE GLASS BELL AWARD AND THE BARRY AWARD FOR BEST FIRST NOVEL