This is the 3rd or 4th or maybe even the 5th time I've listened to this book. Edgar Rice Burroughs' Barsoom series is one of my favorites. I didn't care much for his Tarzan series though. The 1st time I listened to the book I downloaded the text from Project Gutenberg and used text to speech software from Natural Reader and Cepstral to turn it into an audio book. Since then, Librivox has made, audio version, and Audible has added it to it's library.
