When I was a kid I remember going to a relative's house and reading the beginning of a book about warring factions of Dragons. I was not able to finish before the weekend visit was over. I've never found that book and the relative is clueless. Here's what I can remember about the book:
This book was about dragons at war with each other. They could speak and carry on dialog between each other. They had civilizations/societies.
There were at least two warring factions of dragons. I have no recollection as to wether they came from "the same" society, or completely different worlds, etc.
If my memory is right, there were no humans - it was only dragons!
And, if I remember correctly it was a series and this was the first book.
The dragons on the dust cover were flying/fighting in air, one was dark/blue-ish and one was a red color. Very traditional as far as dragons were concerned, similar to GOT - they had distinct scales, not smooth-skin; very mean looking, very "pointy" - everything looked sharp.
I can't confidently say whether they were Dragons or Wyverns.
The dust cover was semi-new looking - to me that means it was likely printed in the 80s or after - but I have no idea if this was a "new" book, or a re-printed one. I would be speculating to say either way. If I had to guess I'd say it was from the later 80s/early 90s.
I read parts of it c.1998-2000 in the US.
For some reason I feel like there was a "space" aspect as if the different factions were from "different planets" but I am less sure about this than anything else. (This is by far the least confident detail.) It's been twenty years and I can't remember enough to track this thing down. I try to search every now and then but I never seem to find it.