Titan: Taking Wing
I wasn't originally planning on reading the Titan books in my ST:TNG re-read. But then while reading the Destiny series and the Typhon Pact series I discovered that there were some characters on Titan that sounded interesting.
This takes place just after the events in ST: Nemesis. Riker finally accepts command of a ship and leaves Enterprise behind. The original plan had been for their mission to be exploration, but they end up being sent to try to help the various Romulan groups deal with each other instead.
There is a lot more diversity in the "aliens", they aren't all just "humans with funny noses". Which is a lot easier to do in a book than a TV show! The dynamics of those kind of differences are always interesting to me.
However, there's a bit of a "soap opera" feel to me. There's a lot more of an emphasis on who's doing what with whom than I've noticed in previous ST books.