Jandar Of Callisto Author:Lin Carter Jandar The Alien Enslaved — On Callisto, moon of Jupiter, a world of black and crimson jungles where the hand of every man is lifted in eternal enmity against every other... a savage, hostile world on which he is first held prisoner by the fearsome insect-men, only to be freed for a more binding slavery in the deadly clutches of the insidious Sky... more » Pirates... and in the incalculable aura of the beautiful princess Darloona who elicits love almost beyond the limits of his mortal soul...« less
I read these as a teenager many years ago. They are pretty much Edgar Rice Burroughs John Carter of Mars series redone on Callisto. If you ever read of John Carter's exploits with Dejah Thoris, and if you enjoyed them, this is for you. Excellent young adult series with lots of action, aliens, sword fighting, and swashbuckling adventure.