The well between the worlds

In Lyonesse, if you know how to swim, you must be a Cross -- a half-human, half-monster hybrid. When Idris Limpet survives drowning, he is condemned to death, but a hasty escape leads him to safety. Now he is going to become a monstergroom and care for the very eatures waiting to be killed for the land's fuel. He can't evenimagine what destiny has in store for him