They know she killed them. They've just never known why.

Connie Cross was a trusted pharmacy assistant when she was arrested for the gruesome murders of at least seven strangers.

Now, she's serving a whole-life order for the shocking crimes she refuses to explain.

Olivia Lang never forgot Connie, the awkward teenager from a south London estate she first met while working for the police.

Twenty years later, Olivia is desperate to understand what made Connie turn into a murderer.

But as she begins to uncover the truth about the UK's most notorious female serial killer, Olivia risks revealing secrets she's kept hidden for years . . .

EVERYONE LOVES CHARLOTTE DUCKWORTH'S NOVELS

'Get ready for a rollercoaster ride' HEAT

'Pulse-pounding' LOUISE MUMFORD

'Had me hooked from beginning to end' 5* READER REVIEW

'The perfect thriller' EMILY FREUD

'Not to be missed' 5* READER REVIEW

'Utterly addictive' WOMAN'S OWN

'A thrilling page-turner' 5* READER REVIEW

'Full of pace, suspense and intrigue' L V MATTHEWS