Off the deep end : a thriller

Summary: "Therapist turned stay-at-home mom Jules Hart's idyllic suburban life shatters when she crashes her car into an icy lake. Her son and another teenage boy plunge into the water with her, but Jules can only manage to save one--the wrong one. Reeling from the death of her son, Jules spirals into a violent and unstable mental state. Ten months after the accident, she's still trying to reckon with the fact that she rescued Isaac Greer, another woman's child, when Isaac suddenly vanishes. Jules finds herself at the center of a massive police investigation. While she harbors her own dangerous secrets, Jules is adamant that she didn't take Isaac. But then who did? Is Isaac the victim of a dangerous killer who's been targeting boys in the Midwest? Or is someone else pulling the strings in this deadly game?"--