For the full review, check the Amazon link above.
I read (and reviewed) this book in 2010 when it first came out, and I was only moderately impressed - but I think I was too close to the subject matter at that time, having recently returned from Iraq myself, and so didn't give enough credit to the information that Matt Gallagher presents.
Reading it again in January, 2012, I found that "Kaboom" holds up impressively well about two years after its initial release; in fact, it feels even more current today, with the Iraq situation very much unsettled despite the US departure. Re-reading it this second time, I now see that this story's wry, funny and detailed style deftly explains one of the least understood aspects of the Iraq War.
I thought the first time I read it, and still think, that "Kaboom's" biggest value is the additional context it might add to a broader book like Tom Ricks' "The Gamble." Since Ricks covers a much broader scope, sometimes the human story gets a little lost. Gallagher gives an on-the-ground look at this often ignored or misunderstood aspect of the war.
Many of the more conventional 'combat' narratives are also well written, but all sort of run together in the growing library of Iraq War books.
Gallagher takes a more unique approach and now stands apart, even more so with some distance and time. "Kaboom" is one of the rare books that's actually better with age.