From the bestselling author of Becoming Mrs. Lewis comes another beautiful story inspired by C. S. Lewis's ability to change the world and captivate hearts-including those of a terminally ill boy and his logic-driven sister. Megs Devonshire is brilliant with numbers and equations, on a scholarship at Oxford with dreams of solving the greatest mysteries of physics. But equations haven't been able to solve her biggest problem: her brother George, whom she adores, has a failing heart. It has been failing for all eight years of his life. When George is given a copy of The Lion, the Witch and the Wardrobe and begs her to find out where Narnia came from, there's no way she can refuse. And so Megs moves completely out of her comfort zone, imploring the author and famous tutor of English Literature to give her the answers her brother so desires. What she receives instead is more stories . . . stories of Jack Lewis's life, which she takes home to George. Meg keeps trying to impose her trusty logic on the stories, but she slowly comes to realize that lists never answer the biggest questions. The gift she thought she was giving George turns out to be the one he was giving her: hope.