'A belter of a thriller. Creepy, convincing, it kept me gripped and guessing' Peter James

A twisty and chilling thriller about a woman who did one bad thing when she was young... and must now suffer the consequences.

She thought she'd got away with it. She was wrong.

Hannah Godley is an agony aunt on a London radio show Queen of Hearts. She's warm and empathetic; a good listener. Her catchphrase is: Always be kind. But when a stranger phones in to tell a tragic story about her brother who killed himself after he was the victim of a terrible prank by two people, Hannah goes cold. Because she remembers Diane's brother well. In fact, all these years later, he still haunts her dreams. All because of that one bad thing she did when she was young...

Is Diane just a sad, lonely woman looking for a friend, or does she know what Hannah did, and is looking for revenge? Because as Diane insinuates herself into her life and family, Hannah is going to discover that you can never truly escape that One Bad Thing you did – sooner or later, you're going to have to pay the price...

Praise for M.K. Hill:

'One Bad Thing is chock-full of suspense... I genuinely had no nails left by the end!' Lisa Hall
'A tense and twisted page-turner that kept me guessing right to the very clever end' Susi Holliday
'Thoroughly enjoyable' Daily Mail
'An engaging, creepy thriller full of twists. One Bad Thing had me so absorbed I read it in a day' Elisabeth Carpenter
'Chilling' Crime Monthly
'A rollercoaster ride with an abundance of twists' William Ryan
'One Bad Thing is addictive right from the go... Impossible to put down!' Rachael Blok
'An addictive read that pulled me in and didn't let go' Cass Green
'Absorbing and twisty' Mark Edwards
'This is a real rollercoaster of a read! Packed full of twists, turns, secrets and suspicions it's a total must read for all psychological thriller lovers. Murderously good!' Steph Broadribb