TNG: Before Dishonor (The most hated book on the BBS, seems like).
Some of us loved it.
TNG: Greater Than The Sum - Excellent
TNG: Indistinguishable From Magic - not read it yet
Typhon Pact: Seize The Fire - not read it yet
TTN: The Red King - is okay, but it's a followup to a "Lost Era" novel, and works best if you've read that first
Death In Winter - I really enjoyed it, but it wasn't what some people seemed to want at the time. Follows up "Reunion".
DS9: Avatar - excellent/essential reading
DS9: Unity - excellent.