CATALYST: previously titled Warning Signs (Angels of Mercy Medical Suspense Book 2)

"A great fast-paced read….Not to be missed for fans of ER and Grey's Anatomy." ~4 ½ Stars, Book Addict

A medical student investigating the mysterious deaths of patients begins to experience the same deadly symptoms herself.

On rotation at Pittsburgh ’s Angels of Mercy Hospital and struggling to finish medical school, Amanda Mason can’t afford to make any mistakes—or to reveal a troubling secret. Mysterious symptoms that defy diagnosis have been affecting her performance, and as she struggles to keep control, the only person who seems to notice is the irritatingly observant and sexy Dr. Lucas Stone.

But when one patient showing the same strange symptoms dies and another slips into a coma, Amanda realizes the clock is ticking on her own survival. With the help of her friends—Gina, a roommate recovering from her own trauma; Lydia, a streetwise ER attending; and Nora, a by-the-book charge nurse—Amanda must solve this medical mystery before she becomes the next victim...

(previously published as Warning Signs)

Want more Angels of Mercy Medical Suspense? Check out the complete series:
LIFELINES
CATALYST
TRAUMA
ISOLATION
And download the Free Angels short story, TOXICITY, at CJLyons.net

Praise for CJ's Thrillers with Heart:
“CJ Lyons scores a major triumph...Totally absorbing and impossible to put down.” ~Douglas Preston, New York Times bestselling author

“A heroine you'll never forget and a story that whips by at bullet speed. It's easy to see why CJ Lyons is a perennial on the bestseller lists." ~Tess Gerritsen, New York Times bestselling author

"A high stakes adventure with dire consequences." ~New York Times bestselling author Steve Berry

"I love how the characters come alive on every page." ~New York Times bestselling author Jeffery Deaver

"Everything a great thriller should be—action packed, authentic, and intense." ~#1 New York Times bestselling author Lee Child

"CJ Lyons continues to mesmerize readers…pulse-pounding." ~Fresh Fiction

Lyons "is a master within the genre." ~Pittsburgh Magazine

“This exhilarating medical thriller gets the blood pumping …This is a terrific thriller and fans of Michael Palmer will enjoy this fine tale.” ~The Mystery Gazette

"A powerful and dramatic look into the frenzied world of emergency medicine...Lyons’ characters are dynamic and genuine. Readers need only shut their eyes to imagine this group on the big screen." ~Suspense Magazine

"Sure to keep readers enthralled…a suspenseful and engaging tale that comes to an exciting conclusion. Readers won’t want to miss this one." ~Romance Reviews Today

"A great fast-paced read….Not to be missed for fans of ER and Grey's Anatomy." ~4 ½ Stars, Book Addict

"Lyons delivers a breathtakingly fast-paced medical thriller." ~Publishers Weekly

"A winner!" ~Romantic Times, Top Pick

"Simply superb…riveting drama…a perfect ten." ~Romance Reviews Today

"Characters with beating hearts and three dimensions." ~Newsday

"A pulse-pounding adrenalin rush!” ~Lisa Gardner

"Packed with adrenaline.