book cover of Sinister Secrets
 

Sinister Secrets

(2026)
(The fifth book in the Cassidy Knox series)
A novel by

 
 
It was a betrayal she thought she had left in the past...

When the search for a missing child leads authorities to the body of a murdered man on the Sanctuary's grounds, Cassidy’s thrust back into a nightmare she’d thought had ended. Though injuries obscure the victim’s identity, she knows who it is—and she knows the terrible truth of what he did.

Desperate to be a part of the investigation, Cassidy leaves her impending retirement behind and joins the Miami FBI field office. But as she’s drawn deeper into the web of her old friend's lies, it soon becomes clear… someone’s trying to send her a message.

Not only is this case personal, but the consequences could prove dire. As every clue reveals a new layer of deception, Cassidy quickly becomes the prime suspect. Framed for a murder she didn't commit, she finds herself up against the last person she expected—and perhaps the only person able to get her to admit defeat.

Prepare yourself for the heart-pounding adventure of what’s possibly the most shocking book in the Cassidy Knox series yet.



Genre: Mystery



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