I got all 3 books of the Disney edition of "John Carter of Mars" and am pleased with them. Contains 11 storeis spread over 3 volumes of about 1000 pages each. The covers are attractive and the paperback is of good quality. If you are a John Carter fan and loved the movie like I did, get this trilogy. However they are not that easy to find at a decent price.
I read all the series years ago, the book draws you into the story so well that you almost feel you are there. (recommend the other series as well like Tarzan, and the Venus series too) ERB should be recommended reading for everyone from 13 up.