I picked up Vol 1 and 2 of this book for cheap, and I'm happy I did. This would be a rage rather than a review otherwise.
With the lack of "classic" Trek books these days I decided to give this a try. While the structure of the writing is good, and the writer clearly has good Trek knowledge and a great imagination, he panders too much to trekkies for my taste. Why is it sci-fi writers are compelled to draw connections between every little aspect of backstories... it's just painful. For example, the author felt compelled to bring into Khan's story every aspect of 20th century Trek lore. From the Deep Space Nine "Area 51" episode to Gillian Taylor (from Star Trek IV) to the immortal Methusalah. Perhaps he thinks he's paying homage to Trek but to this reader it's pure pandering without purpose (these characters bring nothing to the story that a new character couldn't). It's just a nod to trekkies and nothing more.
But if you can look past this prtentiousness then it's a good read.