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 | Their Little Secret by Mark Billingham, Hardcover | Indigo Chapters