A clever, ingenious, edge-of-your-seat thriller.' Liv Constantine

'The stakes are high, the body count is higher, and yet I would still follow Lily anywhere.' Stacey Willingham from the Sunday Times Bestselling author of The Time Worth Killing

It was at this moment that Martha had two competing thoughts. One, that she'd married a nice man. And, two, that he was a complete and utter stranger to her.

After an unexpected, whirlwind romance, quiet librarian Martha married Alan. But when she thinks she sees his mask slip, she starts to fear that the conferences he travels the country to attend might be a cover for something far more sinister. As she secretly starts to map his movements she unearths a string of dead women, but could these two things really be linked? Unsure of her own instincts, Martha turns to an old friend, Lily Kintner, who once helped her escape a toxic relationship in grad school. But what Martha doesn't know is that Lily has a dark side of her own . . .

'Nobody writes psychopaths like Swanson.' Mark Edwards

'The master of the gently perverse.' Crime Time