Their Little Secret : Sphere : 9780751567007 : 0751567000 : 09 Jan 2020 : The sixteenth book in the Tom Thorne series, from bestselling author Mark Billingham. 'Hugely intelligent and authentic' BELINDA BAUER, AUTHOR OF SNAP 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 number one, five-million-copy bestseller Mark Billingham comes a breathless new thriller starring Thorne and Tanner that readers will devour. 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 Billin