Fatal Obsession (A Serenity Springs Mystery Series Book 4)

"PI Bridget 'Birdie' Hartley is still coping with the disappearance of her sister when she receives a strange handwritten note. With renewed hope and Maisy by her side, she travels to Eagle Falls. A string of clues leads them to a woman's doorstep, a woman who shares something in common with Birdie, her ex, Gavin. Birdie senses something off about her ex and his new girlfriend. They seem to be keeping many secrets."–back cover.