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
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