“I wonder how the book got to Guernsey? Perhaps there is some sort of secret homing instinct in books that brings them to their perfect readers.” January 1946: London is emerging from the shadow of the Second World War, and writer Juliet Ashton is looking for her next book subject. Who could imagine that she would find it in a letter from a man she’s never met, a native of the island of Guernsey, who has come across her name written inside a book by Charles Lamb. . . .