The Key to a Killer: A Ruby and Cordelia Mystery

A woman and her ghost roommate investigate their most personal case yet in Olivia Blacke's The Key to a Killer, the next book in the Anthony Award winning Ruby and Cordelia Mysteries.

When Ruby Young discovered that her Boston apartment was haunted, she did what any reasonable person would do: befriend the ghost. Their relationship overcame a shaky start--Cordelia Graves never wanted a roommate in life, she certainly didn't want one in death. After working together to solve a few murders, the two are close friends, but there's a lingering question neither of them have been able to answer: what led to Cordelia's death?

Lately things have been adding up that suggest foul play. And when Cordelia's memories of that day start to come back, the roommates can't ignore it anymore: Cordelia was murdered. Ruby and Cordelia are going to have to piece together what Cordelia's final days looked like--otherwise a killer could go free.

Author: Olivia Blacke
Binding Type: Hardcover
Publisher: Minotaur Books
Published: 10/20/2026
Series: Ruby and Cordelia Mysteries #3
Pages: 368
Weight: 0.95lbs
Size: 8.51h x 5.70w x 1.18d
ISBN: 9781250336736