but gathered up all but Chessman of Mars (of the eleven) at used book stores in the 90s
They are on a small bookshelf in a spare bedroom with all 29 Jim Thompson (weird crime noire like the Getaway and The Grifters and Pop 1280 etc) novels and other oddities (Vonnegut's Player Piano published as Utopia-40 in England, Kilgore Trout's Venus on a Half Shell, old Ursula Lequin, etc).
Started reading The Princess of Mars for the 1st time in 40 years because of your post and found great escapism and adult writing.
I liked The Mars books much better than Tarzan by ERB.
ERB and Bradbury's Martian Chronicles and Ace doubles are my childhood memories of science fiction.