This note was last modified Thursday, 07-Sep-2017 19:14:03 PDT.
Classics of their time. I didn't try them until much later (everything I heard about them made them sound terrible).
I finally tried them when I saw them on Project Gutenberg. As it turns out, I liked the first one well enough to keep going a bit. There was more actual SF thinking than I expected (actual considerations of the gravity come to mind), and less stupidity. (I probably gave it a pass on more racism than I should have based on it being about aliens where the species are more different than the human race is.)