YA Thriller Author
Serial Killer · Psychological · Vigilante · Paranormal
Pen name for Sara Jo Cluff
Hi, I'm Jo Cassidy — a YA thriller author who loves all things creepy. Bates Motel. Stranger Things. Criminal Minds. Prodigal Son. These are a few of my favorite things.
My thrillers span paranormal, psychological, and contemporary — stories designed to keep you up past midnight with the lights on.
I grew up in Yorba Linda, California, and now live in Utah with my husband and our very suspicious cats.
Jo Cassidy is the pen name of Sara Jo Cluff.
Serial Killer Thriller
“Once he's chosen you... there's no escape.”
Seamus is seventeen—and he's finally found the one. She's beautiful. Untouchable. Everything he's ever wanted. And he knows they belong together.
The problem? She doesn't know it yet.
“Seamus isn't the kind of boy who gives up. He fixes things. Removes problems. Erases anyone who gets in the way. Because once he's chosen you... there's no escape.”
For fans of Natasha Preston, Holly Jackson, and Karen M. McManus.
Harper is one of Jo's most beloved series — a YA vigilante thriller set in the chaotic United States of 2098, where sixteen-year-old Harper Chandler runs covert missions for Dogwood Protection Services.
Now you can step into Harper's shoes. Run. Evade. Survive. The streets of San Diego won't patrol themselves.
⚠ Currently in alpha — very much a work in progress.
Play NowSerial Killer Thriller
Seamus is seventeen—and he's finally found the one. Untouchable, beautiful, and unaware of him. But Seamus fixes problems and erases anyone who gets in the way. Because once he's chosen you... there's no escape.
Buy on Amazon →Vigilante Thriller
After the war of 2098, sixteen-year-old Harper Chandler works covert missions for Dogwood Protection Services — stopping terrorists before they strike, all while keeping her double life hidden from a boy she can't stop thinking about.
Buy on Amazon →Psychological Thriller
Fifteen-year-old Cora Snow has a secret only her journal knows. When the journal goes missing, she's forced to break every rule she's ever lived by — or risk everything she's been surviving for.
Buy on Amazon →Paranormal Thriller
Tessa tried to contact her dead mother through a séance. Something else answered. Now she's in a town full of liars, torn between two boys, and losing control of a voice inside her that grows darker by the day.
Buy on Amazon →Explore detailed book synopsis, excerpts, and store links