The New Moon's Arms by Nalo Hopkinson Book

THE NEW MOON'S ARMS is a mainstream magical realism novel set in the Caribbean on the fictional island of Dolorosse. Calamity, born Chastity, has renamed herself in a way she feels is most fitting. She's a 50-something grandmother whose mother disappeared when she was a teenager and whose father has just passed away as she begins menopause. With this physical change of life comes a return of a special power for finding lost things, something she hasn't been able to do since childhood. A little tingling in the hands then a massive hotflash, and suddenly objects, even whole buildings, lost to her since childhood begin showing up around Calamity. One of the lost things Calamity recovers is a small boy who washes up on the shore outside her house after a rainstorm. She takes this bruised but cheerful 3-year-old under her wing and grows attached to him, a process that awakens all the old memories, frustrations and mysteries around her own mother and father.