And a very appropriate person to bump up this old thread.
Lately, McCaffrey has been releasing a trilogy based upon another older triology set on a sentient planet called Petaybee.
The original trilogy is called Powers That Be
and the book in it are called:
Powers That Be
Power Lines
Power Play
They tell the story about how a dying scientist retires to a back water world controlled by a huge galactic corporation, and how she discovers that the world itself is sentient.
The new trilogy is about the children of that scientist, and the trilogy is called The Twins of Petaybee.
So far two novels have been released and they are called:
Changelings
Maelstrom
All five of these books were co-written by Anne McCaffrey and Elizabeth Ann Scarborough.
I read the original trilogy, and enjoyed it, but have not read the new one yet (I am waiting for the third book to come out before reading it).
But yeah, I found the series uneven. Same as the dragonriders one, but maybe due to collaborating in the