Taco USA by Gustavo Arellano

Subtitle: How Mexican Food Conquered America -- After an interesting conversation with some friends about what is and isn't Mexican Food I found this book, totally by accident.  The evolution of Mexican Food is really interesting.  What was popular when, how it was presented, how people craved it.  To me it was quite fascinating.  There is a lot of history, and I sometimes get bogged down in that, but it helps to know what was going on when and how things came to be.  If you love Mexican Food, you should read this book.