I'm generally fond of Brooks' work...
But his characterizations here leave a small, yet large, amount to be desired.
1. For example, the notion that Obi-wan Kenobi would begin to feel personal anger against his mentor Q.G. Jinn because of the latter's slam-dunking Anakin past the objections of the Jedi Council; I find this really hard to believe.*
In this, Brooks displays an unpardonable lack of insight into the bond formed between an older man and his younger protege, (and of humanoid relations, generally).
Not only had Obi-wan been raised by his mentor, he also had been initiated into the arcane practices and disciplines of a highly moral, SPIRITUAL order, taught martial self-defense, and quite likely his life had been saved on several occasions by the older man.
Father, guide, and companion to the younger man, who can seriously entertain the sort of reaction Brooks describes from a man with "the deepest commitment, the most serious mind"?
The strong mythological element in SW clearly casts the Jedi into the role of Spiritual warriors, a la the Knights Templar and certain Alchemists, (e.g., Paracelsus).
That is, "becoming a Jedi is not an easy challenge" precisely because it involves a life of substantial INNER PURITY. Brooks completely misses the point on this one, unwittingly derogating and belittling the powers of the order to something akin to Spiderman.
2. Brooks also appears to be confused on the notion of a laser - lasers are coherent light photons, NOT electrons, as Brooks seems to suggest (final Jedi battle).
3. In fairness, the difficulty no doubt is having to apply his excellent talents to characters not of his own creation, and so by default any description becomes a second-hand portrait, with "something not-quite-right around the mouth".
Overall, the book's OK for an alternate, if not compelling, angle on what goes on in the film.
*Obi-Wan was obviously zealously concerned for his Master's reputation with the Council, and unable to understand his insistence on the boy's training. But PERSONAL rancor? Not in THAT galaxy!