Wendy Wunder calls Proof of Forever, "The Sisterhood of the (Time) Traveling Pants for a new generation " Elegant and evocative, and now in paperback, Proof of Forever is one of those novels that hooks from the beginning and builds toward a stunning--and unexpected--end, calling to mind Gayle Forman and Ann Brashares. From author and poet Lexa Hillyer comes the lyrical story of four seventeen-year-old friends who receive an unlikely...