I reread the Mars books a few years ago, and immediately started looking for the Pellucidor stories. Maybe it's a second childhood, but it sure is fun! When i was about 10 I found The Chessmen of Mars in the attic, stayed up all night reading it, and I was hooked from then on. Burroughs led to Heinlein to Asimov and Bradbury, Arthur C, the list just goes on and on!