Probably my favorite Star Trek novel of all time, The Wounded Sky is full of action, good characterization. and a lot of physics and metaphysics. The Enterprise truly goes where no one has gone before in this one.
It is also that rare beast in which Paramount allowed the author to develop some great new characters and a couple new alien races I wish were in the Star Trek canon. Especially recreations officer Harb Tanzer, who is perhaps the best “created” crew member in the extended mythos of the Star Trek novels.
As I said, this is my personal favorite Trek novel, and I definitely recommend it to any and everyone!