Amazon dot com is taking pre-orders for the next book by Janny Wurts in her Wars of Light and Shadow series.
It will be Wurts's tenth book about the half-brothers Arithon and Lysaer.

Their planet, Athera, had dragons before it had anything else.
The dragons are ginormous, stupefyingly large.
And so potently magical are the dragons that their dreams
are capable of manifesting creation on the physical plane.

Yes, the dragons do talk, but humans for the most part are beneath them, to the dragons' way of thinking.
The dragons limit their communications largely to sorcerers, where humans are concerned. Not to mention those Paravians (not human).

The book is titled Destiny's Conflict.