The second book in the Tale of Henghis Hapthorn.

It was bad enough when Henghis Hapthorn, Old Earth's foremost discriminator and die-hard empiricist, had to accept this coming of a new age of magic. Now he no longer has the leisure to anticipate and prepare for the inevitable changes. Hapthorn finds himself cast forward and stranded several centuries in the future. This new world of contending wizards and hungry dragons is a difficult one to assimilate, and Hapthorn must do so without his magic-savvy alter ego.