Welcome to Mercy House, a state-of-the-art retirement home that appears perfectly clean and orderly . . . but something is turning the residents into monsters. In this thrilling novel from the author of Clown in a Cornfield, you will find little mercy—only a shocking eruption of unfathomable horror.

“[Adam Cesare] has implemented a style that is highly cinematic, merciless in its execution and leaves you hanging on for dear life wondering what he'll do next.” —Horror DNA

“Mercy House is the kind of no-holds-barred thrill ride that horror junkies love to find.” —October Country

Harriet Laurel notices the odor the moment she steps inside Mercy House, brought to the retirement home against her will by her son and his wife. In the early stages of dementia, Harriet has grown to resent her daughter-in-law for not providing grandchildren. Yet as she crosses the threshold, she notices her mind begins to sharpen. Then her hate begins to grow. . . .

Arnold Piper, an eighty-five-year-old ex-Marine, has always prided himself on self-reliance. But betrayed by his own body, he’s learning that surviving war-torn Korea was easier than facing the daily indignities of old age. And his worst trials are still to come.

Sarah Campbell, an idealistic nurse, is already stretched thin at the chronically understaffed Mercy House. Now her duties are about to take a terrifying turn. Can she survive the night. . . and her patients?