A random sequence of murders rocks West Gloucestershire. First one, then another. From calculated and clinical, to opportunist and frenzied. As the body count tops five, Detective Inspector Steph Lewis’s investigations point to Amy Ashby as chief suspect for the rampage. 
 
Steph and Amy were arch enemies at school. 
 
Amy, still seething with fury about what Steph did back then, refuses to let the detective stand in the way of her current hunt for a new man and a fresh start. This time, it is for keeps.
 
As the evidence mounts, Steph is convinced of Amy’s guilt. But is Steph obsessed with a schoolgirl vendetta that could wreck her career and destroy her family? Or is she closing in on a deadly killer?
 
Her Deadly Friend is the first book in the Gloucestershire Crime Series, featuring DI Steph Lewis, a spirited, no-nonsense detective with secrets of her own.