DragonWorld by Bryon Preiss and Michael Reaves, Illustrated by Joseph Zucker

This was one of those early books of fantasy that I have hung onto ever since I first got it. The story is pretty straight up, typical, fantasy of the time, but the interior illustration by Zucker is really what sold it. I poured over them for hours, copying them and trying to emulate them in my own daffy little pictures I drew.

You can still get it if you look hard enough. I think Amazon only has them as second hand now. It's worth a look if you like dragons and fantasy mixed with some really cool pencil illustrations.