What Momma Left Me By Renee Watson. Serenity knows she is good at keeping secrets, and she's got a whole lifetime's worth of them. Her mother is dead, her father is gone, and she and her brother have to start over again by moving in with their grandparents. At first, things seem like they could be good: a new friend, a new church, a new school. But when her brother seems to be going down the wrong path, the old fears set in. Will he end up like their dad? Will she end up like their mum? In this exquisite coming of age story, Serenity discovers it is the power of love that keeps you sure of who you are, and who you will become.