"I don't know how my life would be different if I never had my sister, but I do know that the steadiness in how I stand in the world is in large part because she exists." Two sisters-one a playwright, one a preacher-excavate their evolving bond. Swinging between irreverent humor and achy tenderness, Sistering: The Art of Holding Close and Letting Go is for anyone who has been lucky enough to find their number one fan, and...