SPOILER LEVEL: Low
This is a great character-driven book, focusing on a young Commander James T. Kirk's time with Carol Marcus, and Spock's time with Leila Kalomi (from the episode "This Side of Paradise").
The main plot deals with Carol & Leila's project (yes, they know each other here, but it plays out alright) dealing with protesters who fear that mankind has become too dependant on technology-- but really, that's just the window dressing. The real story here is seeing how much in love Kirk & Carol are, and how their separate dreams and goals are destined to take them in different directions. And of course, as the title would suggest, how Carol comes to be pregnant with Kirk's son David.
A worthwhile read and a wonderful break from all the massive post-Destiny continuity books!