The Ambivalent Magician — Simon Hawke

Trying to discover time travel, genius scientist Dr. Marvin Brewster accidentally transports himself to a parallel universe where magic really works and reality is ... a little different. His knowledge of science causes him to be mistaken for a sorcerer, something he exploits in his efforts to survive and find his missing time machine, which is the only way that he can get back home. However, what Brewster doesn't know is that his time machine has fallen into the hands of Warrick Morgannan, the powerful Grand Director of the Sorcerers and Adepts Guild, and using magic in his attempts to learn how the machine works, Warrick keeps putting people into the machine and making them disappear ... only to reappear in our world, where a British tabloid reporter stumbles on what may be the biggest story of his life.Frustrated in his efforts to learn the secret of the time machine, Warrick turns his magic on the Narrator, the disembodied voice in the ether that only he can hear, determined to find a way to interfere with the Narrator's mysterious ability to control events...