I read my first ERB books in the mid 1960’s, read them all.
BTW most of these ERB John Carter books are free for the Kindle from Amazon, my 18 year old son devours them, they have all the classic values missing from todays society.
See my previous posts. The books still falling under copyright in the U.S. due to our insane copyright laws are available from PG Austrailia. I've downloaded all the books at PG-AU, and am in the process of converting them to epub from the raw text available there. I've done 3 so far, and will be sending the finished copies to PG-AU to see if they'll post them as epubs. If you'd like another format, contact me and I'll create them as well. I think I can convert to just about any current ebook format.