The Perfect Son by Lauren North. Published by Berkley

After the death of her husband, Tess Clarke concentrated all her energies and emotions into caring for her young son, Jamie. But when she wakes up in the hospital the day after his eight birthday, she’s in a panic, her son is missing, she’s been stabbed and her brother-in-law is somehow involved. Pity no one takes her seriously. With strength born of desperation, Tess investigates the accident that caused her husband’s death and what role her brother-in-law may have played in his death, her own stabbing and her son’s disappearance. They say most violent crimes are committed by  someone close to the victim and North writes a chilling, up close and personal novel that will have you questioning the people you trust most in your own life