I liked this book quite a bit. It was a tad slower than the first book in the series and I think the reason I enjoyed it was because two days after I finished this book I traveled down to Mexicali and Calexico, which were two of the main areas that this book focused on. 
 The "mystery" as it was wasn't a truly inventive for me, but to put it into to perspective this book was written long ago. But the subsequent novels have only gotten better for me as I have continued to tear through them.