This is a very interesting book, with excellent material and lots of valuable information. It definetely shows that the author has done extensive research on the subject, and it provides a good overview of the historical elements that led Mexico to this violent war, and the role the United States has played.
There are, however, several mistakes. Some are simple factual errors, one of them already in the first page, some simply grammatical errors and misspelling of spanish phrases. One upsetting aspect is that chapter 1 has a section missing, probably due to a printing error, so one parapragh cuts off on one page, and the following page begins a whole new section. You may want to wait until a new corrected batch is printed, or a new edition is published.
Other than that, I recommend the book for anyone interested in learning the basics of the Mexican Cartel wars.