Released on 09 February 2017.

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What You Don't Know

3.8 based on 471 ratings & 141 reviews on

2017 Long-listed

CWA John Creasey New Blood Dagger


Catching the killer is just the beginning in the outstandingly dark debut, What You Don't Know, from rising grip-lit star, JoAnn Chaney.

Do you really know your neighbours?

Jacky Seever was a beloved local businessman and pillar of the Denver community. Until thirty-one bodies were discovered in the crawlspace of his house.

Detective Paul Hoskins was lauded for bringing down one of the most ruthless serial-killers of the decade.
Sammie Peterson, the lead reporter on the case, finally obtained the success she craved.
And Seever's wife, Gloria? Well, she claimed to be as surprised as everyone else.

But when you get that close to a killer, can you really just move on?

In the media

JoAnn Chaney's book, mysterious with all that is concealed and undeclared, compels the reader to acknowledge that things are not as simple as we like to believe, and to recognize that evil does not always lay outside of us, but deep within us. Chaney's psychological insights and social perceptions are infallible - brutal, indignant, and full of surprises
Susanna Moore author of The Whiteness of Bones and In the Cut
A thrilling read in the tradition of Jeffery Deaver's The Bone Collector
Superb characters, sparkling dialogue, and a gripping, terrifying plot, plus flashes of humour to boot; this book has it all. It's very hard to believe this is Ms. Chaney's first novel
Chris Pavone, New York Times bestselling author of The Travelers