She says she’s an ordinary mother.

He knows a liar when he sees one.

Sarah thinks of herself as a normal single mum. It’s what she wants others to think of her. But the truth is, she needs something new, something thrilling.

Meanwhile, DI Tom Thorne is investigating a woman’s suicide, convinced she was driven to do it by a man who preys on vulnerable women.

A man who is about to change Sarah’s life.

From five-million-copy bestseller Mark Billingham comes a breathless new thriller starring Thorne and Tanner that readers will devour …

‘You will not be able to put this book down. Their Little Secret is an unforgettable ride’ KARIN SLAUGHTER

‘Hugely intelligent and authentic’ BELINDA BAUER, author of Snap

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PRAISE FOR MARK BILLINGHAM

‘One of the great series of British crime fiction’ THE TIMES

‘An unconventional literary superstar’ MAIL ON SUNDAY

‘Billingham is a world-class writer’ KARIN SLAUGHTER

‘A new Mark Billingham is always a treat’ SUSIE STEINER

‘Finely paced and polished procedural, with twists and turns galore’ CARA HUNTER

‘Perfectly executed and with a thoroughly unnerving twist’ GUARDIAN

‘Thorne is a terrific invention’ IRISH INDEPENDENT

‘Mark Billingham gets better and better’ MICHAEL CONNELLY