I know it's a bold claim, but this book lives up to it. I have read about every star trek book written - certainly all about the classic crew - and this is head and shoulders the best.
The characterisation is spot on, but it doesn't restrict itself to how we normally see the characters, but even in unusual situations, every note rings true. I read it years ago and I read it again recently and it is brilliant.
There are several story strands, but the most wonderful is the idea that McCoy has amnesia after an accident, and has reverted to his 20 year old self, believing he has recovered after a riding throw. He is then faced with being head of a medical department, and scared to death of the imposing Spock. He finds it inconceivable that he's regarded as the only person who holds their ground with Spock in an argument. We then see the ship, it's routine and it's life through the new eyes of an old friend, as they deal with a horrific menace that truly chills the blood.
Wonderful stuff. Most Star Trek books I read hopefully, but put down a bit disappointed at their superficiality - this was a marvellous lesson in how it can and should be done. It's just a shame she never did more about the classic Enterprise.
Buy it now!