A review by slferg
The Oathbound Wizard by Christopher Stasheff

5.0

Matt is frustrated at Alisande's refusal to set a wedding date. When he finds out she's reluctant to marry him because he's not royal, he flies into a rage and swears an oath to God that he'll go win a kingdom and throne. And is promptly taken up on the offer, not by Alisande but by heaven. He tries to say "oops, didn't mean it" but decides he really did. So he's in the evil kingdom of Ibile and picking up friends as he goes. He frees a dracogriff from a sorcerer's trap, helps out a cyclops, saves a maiden from pursuit when she is fleeing from a castle under seige and runs into some old friends. And learns a lot about faith and watching his temper and his mouth......