This Is My Body , Cameron Dezen Hammon ‘s debut memoir, opens with the author on stage at The Refuge, an evangelical megachurch in a suburb of Houston where she works as worship leader, a role for which she must “look young, but not too young…pretty, but not too pretty.” In front of the stage, a white casket holding an 18-year-old girl sits open, obscured by the colored lights and the fog pouring from a machine backstage. “We’re both objects in this space,” Hammon writes, “the eighteen-year-old girl and me, two different kinds of painted dolls.” Just before she begins to sing, Hammon’s phone vibrates in her dress pocket as she receives texts from a man she met an arts conference, “a man I might love, who is not the father of my eight-year-old daughter. Not my husband of twelve years.” Meanwhile, beside her on stage, Hammon’s husband, a member of the worship band, strums his guitar and waits for her to begin. “Much of the time these days, I don’t believe what I’m singing,” she writes,...