Rod Gallowglass is a man of science who does not believe in magic. He is also an agent of SCENT who stumbles across a strange new world
 
Gramarye is a world of medieval people, witches and warlocks, and all manner of mythical creatures. Rod is aided by his faithful companion Fess, an epileptic robot. While gathering intelligence, Rod discovers the planet is in political turmoil, and extensive off-world influence organizations who plan to corrupt the planet away from democracy, which Rod plans to bring to the planet.
 
The only way to thwart these destructive influences (both local and those being created from the outside) is for Rod Gallowglass must become a part of the local fabric and lead Gramarye as one of their own. But to do so, he must put aside his own convictions and beliefs, and become a warlock, in spite of himself.
 
A grand adventure mixing science fiction with fantasy that spawned a whole series.