The Chronicles trilogy is the first trilogy in the DragonLance saga.
Originally, there were three books:

Dragons_of_Autumn_Twilight
Dragons_of_Winter_Night
and Dragons_of_Spring_Dawning

In 1995 a fourth book in the series, Dragons_of_Summer_Flame came out

The first three books tell the story of the companions fighting against Takhasis, the Queen of Darkness and the last book tells the story of their children waging war against Chaos, the father of the gods who is seeking to destroy the world.

All of these books were written by Margaret Weis and Tracy Hickman.