Thanks for sharing! This is neat.My favorite book of the 3 so far is probably the 2nd book, Drastic Measures by Dayton Ward. I really liked the character of Lorca. A no nonsense kind of guy but with a bit of a dry wit. I liked when he told the other officer that his girlfriend was the only one allowed to call him Gabe without getting their head handed to them basically, that sort of thing. And I can see the events on Tarsus will have an effect on him in the future probably making him even more no nonsense. I got a sense their that his girlfriend (I apologize that I can't recall her name at the moment) would have helped him open up a bit more but now that she's gone I suspect in the show he's probably more serious.
I've learned a lot about Burnham and Saru in the other two books with each getting a bit more coverage in the opposite book. Saru of course is always fighting his fearful nature. He strikes me as very cautious and more strictly by the book. Though by the end of Fear Itself he seems to want to grow beyond that. However I get the impression he's still very cautious by the time of the show. Burnham is definitely a risk taker, that I even gathered from the pilot episode I saw. It's an interesting dynamic because of her being raised by Sarek you'd think she'd be more cautious and reserved. Yet she is more fly by the seat of her pants (though she seems to keep her emotions in check). In the first novel driving headlong into danger and in the last beaming the probe on board over Saru's objections. And she seems to like getting under his skin though some of that seems subconscious. She likes the rivalry but I never got the impression she considers him an enemy or even a rival (while he feels she is a rival on the other hand).
Georgiou is given some decent coverage too and I like her character. She seems to have some of Kirk's characteristics. She wants to hear opinions and encourages a free flow of information, yet she is decisive and she has the loyalty of her crew. And she can be unpredictable like Kirk. She also seems to encourage a bit of rivalry between Burnham and Saru, but because I think she thinks each has something the other lacks and she hopes they both work together and help each other in that regard. Those were the main characters I've thus far have gotten a decent feel for by the books without the show. I'm not sure how many characters carried over from the Shenzou to the Discovery. Wheeton was another character I recall from Fear Itself that had some good development, however, I'm not sure that he ends up on the show. But he seemed like a bit of a hot-head but to his credit he did try to reign that in and was willing to calm himself and listen to Saru.