While driving alone one rainy night, veterinarian Cassie Larkin, the narrator of Chavez's propulsive debut set in California wine country, spots a large man menacing a young woman in the road. Cassie stops and calls 911, but against the dispatcher's advice, she gets out of her van and confronts the man, who threatens Cassie before escaping with her car. The next night, which is Halloween, Cassie's husband, Sam, abandons their six-year-old daughter, Audrey, while trick-or-treating and disappears. Det. Ray Rico, who investigates, suspects that either Cassie or her 15-year-old son, Leo, is involved in Sam's disappearance. Chavez peoples her tale with credible, flawed individuals, presenting even the multiple antagonists with harrowing backstories and convincing psychological motives. While readers must suspend disbelief at times (as when Cassie fails to check in with Rico and goes rogue), Chavez is in full command of plot and pacing as the connection between Cassie's roadside confrontation and Sam's disappearance becomes clear. Domestic thriller fans will be well satisfied. Agent: Peter Steinberg, Foundry Literary + Media. (Feb.)

In this promising debut--rights have already been sold to six countries--veterinarian Cassie Larkin is driving home on one of those fabled dark and stormy nights when she sees a man assaulting a woman by the roadside and gives chase. The perpetrator circles back to steal her car, her husband disappears the next night while trick-or-treating with their daughter, and Cassie must take control of an upended life. With a 50,000-copy first printing.

A good Samaritan incurs a psychopath's wrath in this debut thriller.Veterinarian Cassie Larkin is heading home after a 12-hour shift when someone darts in front of her car, causing her to dump her energy drink. As she pulls over to mop up the mess, her headlights illuminate a couple having a physical altercation. Cassie calls 911, but before help arrives, the man tosses the woman down an embankment. Ignoring the dispatcher's instructions, Cassie exits the vehicle and intervenes, preventing the now-unconscious woman's murder. With sirens wailing in the distance, the man warns Cassie: "Let her die, and I'll let you live." He then scrambles back to the road and flees in Cassie's van. Using mug shots, Cassie identifies the thief and would-be killer as Carver Sweet, who is wanted for poisoning his wife. The Santa Rosa police assure Cassie of her safety, but the next evening, her husband, Sam, vanishes while trick-or-treating with their 6-year-old daughter, Audrey. Hours later, he sends texts apologizing and confessing to an affair, but although it's true that Sam and Cassie have been fighting, she suspects foul playparticularly given the previous night's events. Cassie files a report with the cops, but they dismiss her concerns, leaving Cassie to investigate on her own. After a convoluted start, Chavez embarks on a paranoia-fueled thrill ride, escalating the stakes while exploiting readers' darkest domestic fears. The far-fetched plot lacks cohesion and relies too heavily on coincidence to be fully satisfying, but the reader will be invested in learning the Larkin family's fate through to the too-pat conclusion.Chavez delivers a fraught if flawed page-turner that attempts too many twists. Copyright Kirkus Reviews, used with permission.