Warlock in Spite of Himself Series by Christopher Stasheff
Warlock in Spite of Himself #3
Warlock in Spite of Himself #4
Warlock in Spite of Himself #5
Warlock in Spite of Himself #7
Warlock in Spite of Himself #9
Warlock in Spite of Himself #12
Warlock in Spite of Himself #13
