The Key to a Killer

The Key to a Killer is an upcoming novel by Olivia Blacke and the third installment in The Ruby and Cordelia Mysteries series.

More details about The Key to a Killer will be revealed soon.

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Mystery Cozy Mystery

Release date: October 20, 2026

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The Ruby and Cordelia Mysteries

The Ruby and Cordelia Mysteries consists of two books and series is set to expand with the upcoming release of one more book. The current recommended reading order for the series is provided below.

Unrated

Death at the Door (The Ruby and Cordelia Mysteries #2)

⧗ 8.00 (1)

The Key to a Killer (The Ruby and Cordelia Mysteries #3)

⧗ 8.00 (1)