A fresh, clever psychological thriller full of toxic characters you'll love to hate.

Takes the ordinary and twists it until the sense of danger is utterly overwhelming. Tammy Cohen is rapidly becoming one of my favourite authors

A compelling tale of office politics and childhood trauma, that slices through the insecurities, jealousies and hidden agendas of the work place. Skilfully written with Cohen's trademark piercing observation and vivid imagination, this book will have you nervously watching your colleagues wondering what lies beneath their masks. With twists and turns and expertly ratcheted tension, it had me gripped from the off.

I was on the edge of my seat. Psychological thrillers don't get much better than this!

Tammy's books have a way of making you feel like something truly awful is just seconds away, and your whole body is tensed waiting for it. Dark and menacing you won't want to put this down until you know where the danger is coming from.

A taut, immensely readable thriller that kept me guessing right to the end. I love Tammy's books and this one certainly doesn't disappoint.

A toxic working environment is a great setting for a psychological thriller and the plot of 'When She Was Bad' more than lives up to its original and gripping premise. I couldn't stop reading

Truly terrifying

An intelligent and satisfying mystery

Cohen will keep you guessing right to the end, and just when you think you've worked out what is going on, you'll change your mind again. A must-read for fans of psychological crime thrillers

This book is difficult to put down. Tammy Cohen will keep you guessing to the end, and just when you think you've worked out what is going on, you'll change your mind again.

This was so gripping, I felt I'd been stuck to the pages. It will keep you guessing.

Unsettling, tense and utterly unputdownable. Kept me reading into the small hours.

This psychological thriller will have you questioning everyone you know . . . [and] . . . keep you guessing right till the end.

A thriller with startling twists and a kick to the finish.

A cracking psychological thriller that drips with menace...tightly plotted and completely engrossing.

Joanne Harris is best-known for the France-set novel Chocolat,.But she does a nice line in witty psychological thrillers...Excellent.

The characterisation is always totally convincing....The denouement is exciting and totally surprising to the reader...a thrilling and unexpected ending.