The Voyage of the Dawn Treader
by C.S. Lewis
Lord Rhoop is one of the seven missing lords of Narnia. Exiled by King Miraz, he sailed east with his six companions and was left at the Dark Island where dreams come true. Unfortunately the dreams that come true on the island aren't exactly the kind that he was hoping for, and he lives for many years in a state of constant psychological torment. He is rescued by the Dawn Treader and is finally able to relax in a dreamless sleep on Ramandu's Island.