Here's some more detail from Dayton Ward's blog
Revelations and Dust by David R. George III, “starring” members of the Star Trek: Deep Space Nine cast (September)
The Crimson Shadow by Una McCormack, focusing on Picard and Garak (October)
A Ceremony of Losses by David Mack (November)
The Poisoned Chalice by James Swallow, focusing on Riker and the crew of the U.S.S. Titan (December)
Peaceable Kingdoms, by me, “starring” Picard and the Enterprise-E (January 2014)
I'm really psyched about the Una McCormick book. I can't wait to see how frustrated Picard gets dealing with Garak, or at least I'm assuming that's what's going to happen.
Dayton said farther down in his post the reason he didn't say what David Mack's book was about is because David hasn't said so himself and doesn't want to steal his thunder.