Pern Novels [chronological order]25 books in series
Dragonsdawn Publisher's Summary
Then, some of the colonists noticed that the small, dragon-like lizards that inhabited their new world were joining the fight against Thread, breathing fire on it and teleporting to safety. If only, they thought, the dragonets were big enough for a human to ride and intelligent enough to work as a team with a rider...
And so they set their most talented geneticist to work to create the creatures Pern so desperately needed - Dragons!