Don't Let Him In by Lisa Jewell

He’s the perfect man. It’s a perfect lie.

Nina Swann is intrigued when she received a condolence card from Nick Radcliffe, an old friend of her late husband, who is looking to connect after her husband’s unexpected death. Nick is a man of substance and good taste. He has a smile that could melt the coldest heart and a knack for putting others at ease. But to Nina’s adult daughter, Ash, Nick seems too slick, too polished, too good to be true. Without telling her mother, Ash begins digging into Nick’s past. What she finds is more than unsettling…

Martha is a florist living in a neighboring town with her infant daughter and her devoted husband, Alistair. But lately, Alistair has been traveling more and more frequently for work, disappearing for days at a time. When Martha questions him about his frequent absences, he always has a legitimate explanation, but Martha can’t share the feeling that something isn’t right.

Nina, Martha, and Ash are on a collision course with a shocking truth that is far darker than anyone could have imagined. And all three are about to wish they had heeded the same warning: Don’t let him in. But the past won’t stay buried forever.