The Day I Died by Lori Rader-Day:

From the award-winning author of Little Pretty Things comes this gripping, unforgettable tale of a mother’s desperate search for a lost boy.

Anna Winger can know people better than they know themselves with only a glance—at their handwriting. Hired out by companies wanting to land trustworthy employees and by the lovelorn hoping to find happiness, Anna likes to keep the real-life mess of other people at arm’s length and on paper. But when she is called to use her expertise on a note left behind at a murder scene in the small town she and her son have recently moved to, the crime gets under Anna’s skin and rips open her narrow life for all to see. To save her son—and herself—once and for all, Anna will face her every fear, her every mistake, and the past she thought she’d rewritten.