Merlino, Stephen books

The Jack of Souls

Willard stared, uncomprehending. “You mean a magical creature?” said the Kwendi. “Like a shadow or trysting servant?” “No, no, no—I mean, yes, but… You see, I was afraid of him at first, but he’s very sweet and kind, and he would never do magic on you if you didn’t want it. He is very respectful....