When I was little (late 80s early 90s) my mom got me this book. I don't remember what it actually was about. It was for sure above my level at 5 or 6. I'm not even sure if she ever read it to me. It was hard cover and the book was silvery grey. No pictures on the cover. There was no dust jacket.
I do clearly and vividly remember the pictures. They were of wizards male and female. Their dragons and their castles. I also think there was a wizard for each season. They were BEAUTIFUL! I used to spend hours looking at it.
Each chapter was a different wizard, Dragon and castle. There was one for each season I think. I am pretty sure it started in spring or winter. Something is making me think the spring wizard was called the vernal wizard or something similar