A Time for Secrets by Julie Britton

A sympathy card.
A cryptic message.
A mutilated rag doll.
Someone is terrorizing Amanda Beckett and her four-year-old daughter, Kristi, and when the police in Hibiscus, Florida, refuse to investigate, there is only one person she can turn to—her ex-husband, Josh, the man who walked out on them three years before.
Josh is surprised by the middle-of-the-night phone call from Amanda. He has never stopped loving her, and even though being with her again again will only dredge up emotions he’s been trying to deal with since their divorce, he is determined to do whatever it takes to keep them safe.
As the threats increase, Amanda realizes they are connected to a secret she has carried for more than twelve years, a secret that destroyed her marriage. She has no choice but to finally confess to Josh, praying it’s not too late to save their daughter’s life…and maybe, one day, to give their marriage another chance.