I really enjoyed this book. (I requested the book after seeing the new John Carter of Mars movie, because I wanted to see how similar the book was to the movie - as I was intrigued by the knowledge that the book was written in 1912 and that most of our modern sci-fi all started with Burroughs' story). Although they are not exactly the same, the movie stays true to most of the events and plot elements in the book, as well as the visuals. Burroughs was most definitely WAY ahead of his time when it comes to sci-fi. 
 Has a REALLY sad ending, though (it would be even sadder if that's where the entire story left off... thankfully, it isn't). I'm going to have to continue reading in the series.