Every school has its scandals. This one could be fatal.

'Had me hooked from page one' JENNIE GODFREY
'Deliciously dark' JANE FALLON
'Relentlessly gripping...Original, atmospheric' LUCY CLARKE

Centuries of tradition are coming to an end at St Cordula's Catholic boarding school. Deputy Head, Fiona Fox, is about to preside over a controversial move to save it from ruin.

Legend has it that the ghost of fifteenth-century nun, Sister Matilda, will keep St Cordula's safe. But only as long as the words 'GOD FORGIVE ME', scrawled by Matilda on a chapel staircase wall before she fell to her death, are repainted every year. The words have only been allowed to fade once, in 2002. Then, fits of vertigo spread through the pupils, and a second girl fell to her death on the night stairs.

Only three people know the truth of what happened on the night of the tragedy. Now the vertigo is back, and unless Fiona can stem the outbreak, St. Cordula's darkest secret could claim another girl's life...

The new thriller, with a jaw-dropping twist, from bestselling storyteller Erin Kelly

'A complex and beautifully written gothic thriller...I raced through it' CLARE MACKINTOSH

'Outstanding...as much an insightful novel about female friendship and betrayal as it is a compelling mystery' JANE CASEY

'A stylish and utterly compulsive read from one of my favourite storytellers' RUTH WARE

'Hysteria, secrets, faith... and murder? This gothic boarding school mystery...gripped me until the very last twist' JUNO DAWSON