In the bestselling tradition of The Girl on the Train and In a Dark, Dark Wood, from the internationally bestselling author whom Stephen King called “an absolute master” of the psychological thriller, comes a riveting suspense novel about the unlikely friendship between two pregnant women that asks: how far would you go to create the perfect family? Agatha is pregnant and works part-time stocking shelves at a grocery store in a ritzy London suburb, counting down the days until her baby is due. As the hours of her shifts creep by in increasing discomfort, the one thing she looks forward to at work is catching a glimpse of Meghan, the effortlessly chic customer whose elegant lifestyle dazzles her. Meghan has it all: two perfect children, a handsome husband, a happy marriage, a stylish group of friends, and she writes perfectly droll confessional posts on her popular parenting blog—posts that Agatha reads with devotion each night as she waits for her absent boyfriend, the father of her baby, to maybe return her calls.