Book of Spells was published by Double Edge in 1994.
Bart and Masloc (an intellectual and a rogue, respectively) are time travelers who are on a quest in a nondescript ancient land peopled by the standard group of miscreants, marauders, and monsters of all races and creeds. There are demons to be fought, and of course plenty of women to be victimized and saved by the intrepid Masloc. Meanwhile, another adventurer named Peter White faces some demonic threats of his own, but he is aided by a powerful ring of life.