I think the book was to be one of a series, but I only read the first one. It was set in a land with a limited map, like a world within a land, and the people who lived in the land where unaware of the wider world.
There was a red dragon or lizard named Jaz or Baz or Kaz who was funny and the best friend of the human, who I believe was female.
The cover had the lizard-type creature perched on a roadside boulder, with the road winding down a hill and maybe clouds around the edges.
I believe I read it in the 90’s or 00’s
In addition, my son says this:
Kaz is the name of the dragon for sure. The land is separated by walls, and one or some start breaking down and that’s the main conflict. Later they find out that the world is set up that way because of fantasy space computers.
Could this be one of the many ‘Dragonlance’ books? They do include a minotaur called Kaz.
Sadly no, the world sounds pretty different. Thanks for answering!