"The Family Fang meets The Storied Life of A.J. Fikry in this literary mystery about a struggling bookseller whose recently deceased grandfather, a famed mathematician, left behind a dangerous equation for her to track down--and protect--before others can get their hands on it. Just days after mathematician and family patriarch Isaac Severy dies of an apparent suicide, his adopted granddaughter Hazel, owner of a struggling Seattle bookstore, receives...