The Costa Book Awards honour some of the most outstanding books of the year written by authors based in the UK and Ireland.
There are five categories:
- First Novel
- Children's Book
One of these five winners is also chosen as Book of the Year, announced at an awards ceremony in London in January.
Launched in 1971 as the Whitbread Literary Awards, they became the Whitbread Book Awards in 1985, with Costa taking over in 2006.
Of the book, judges said: "Impossibly clever, genre-busting murder mystery that feels like a mash-up of Cluedo, Sherlock and Groundhog Day."
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