When I read the description of A Book of Tongues at the store, I knew I had to get it. Gay cowboy wizards involved with ancient Mesoamerican gods? What's not to like! 
 Unfortunately, I just could not get into it. All the elements of a book I'd really like are there, and I found it full of great ideas, but the execution just fell flat. The narrative style was inconsistent, slipping back and forth between modern and Cowboyese. I also noticed several errors - wrong grammatical use, wrong diction, etc - that made the book a hard slog. And while it's clear that a lot of research was done in the writing of the book, there were a few anachronisms that I found rather jarring (such as one character's use of the term "glory hole," which was not used in its present sexual context until much later). 
 The feverish quality of the narrative meant that I could never get a grasp on the characters - something that's necessary for me to care what happens next. The entire book read like the weird dream/trance sequences that I always skim through. 
 All in all, I find myself very disappointed. I love creative magic systems and I just can't get enough of books that incorporate mythology into their narrative, but A Book of Tongues just did not do it for me.