Wow! It's really hard to pick a favorite I also Like Doctor's Orders by Diane Duane and the Crucible Novel about McCoy is also really good.I really like A choice of Catastrophies & Dreams of the ravens. Also there's another McCoy novel about McCoy and his daughter Joanna Crisis on Centaurus.by Brad Ferguson
All I remember about Crisis on Centaurus is that everybody keeps putting on and taking off their sunglasses (seriously).
One of my favorite McCoy-centric novels is The Romulan Way
by Diane Duane. McCoy is sent to make contact with an undercover agent feared to have "gone native". It's a very good adventure story.
I loved the Crucible novel about McCoy. It's by far the best of the three.
Although technically not McCoy centered I would also reccomend Spock's World as it gives McCoy some of his finest moments especially when he gives an impassioned speech which elicits a surprising response from a Vulcan science officer of his acquaintance.
Absolutely! This is one of my favorite Star Trek books, ever
. And the speech referred to gave me insights that apply to RL politics going on in Canada - if you try to break up a political/cultural entity, who profits?
Heck, just read all of Diane Duane's books. She couldn't write a bad Star Trek novel if she tried.