Lawrence of Arabia jokes number too many. Indeed, I get tired of the campy humor here, especially when the point is only to depict the Vulcan rejection of emotion. I would have expected less of this in a book focusing on Vulcan characters, and more explanation of exactly how and why Vulcans think. If one cannot find what a core Star Trek Vulcan is by reading a book or two in that world, then where can a fan find it? What we have here is more a sociological examination of planet Vulcan, by comparison with planet Obsidian, without enough genuine affinity for the stark reality of Vulcan logic. Instead, despite the attempts to paint a clever family portrait of Spock's family, we find Vulcans as the brunt of typically xenophobic Earth jokes again and again.
There ought to be a rule in fiction that narrative flashbacks to the past be no longer than the main text which they supposedly support. Otherwise what we have are nonlinear works approaching pure conceptual abstraction, or multiple timeline story structures. This book has two parallel threads spaced apart in Spock's childhood and adulthood, which toggle back and forth in the course of the book. Well, I'm all for structural experimentation in fiction, but this book came across as being two books in one, both history and present, with some flavor of recursion to it. I had to wonder if each of its two authors favors one period. The affect to the reading experience is a level of distraction not unlike actually reading two different books at once. It's like building the foundation and second story of a house at the same time - you end up walking on planks.
That said, I did enjoy the book, and it is a valuable addition to the Vulcan side of Star Trek. Both of the hot desert planets featured are reminiscent the kind of extreme climate that you might also find on Arrakis, Mars, or other such places. The family developments showing Spock's character are interestingly conceived and gel well with the little other Vulcan fiction I've read, as is the fragility of Spock's command of the Intrepid II minus the presence of Kirk. There's also a good sense of adventure and survival which lends a lot of needed isolation to the characters for examination. The detailed look into the flora, fauna and geology of Vulcan are highly commendable!
The greatest offering that this book makes to Star Trek is more depiction of historical relations between Vulcan and Romulan societies, their philosophical schism, and their possible remelding. We see another side to the Romulans, and there are strong hints that not just Spock's destiny, but also that of all Vulcan and the Federation will be primarily affected by choices posited here.