After mentioning William Auld’s list of Esperanto Classics, I went off in search of the fabled compendium myself. The best link I’ve found thus far is on Tim Westover’s blog on Esperanto-USA. He has placed links to Esperanto-USA’s bookstore for relevant works, as well, so it’s easy to find a copy of the book you want.

Take a look at the post here. Thank you kindly for your helpful list, Mr. Westover!