I just re-read all eleven books of Edgar Rice Burroughs‘ Mars series. I saved the first (and best) for last: A Princess of Mars. I have no idea how many times I have read these books, since I first came across them in my early teens.
If you have read it, you know that this is some of the best pulp adventure fiction ever written. If you haven’t read it, go get it — the Amazon link above is to the Dover paperback, a good deal at four and a half bucks.