About 20 years ago I read a lot on my PC. At that time Project Gutenberg sold CDs of their current collection of Public Domain ebooks. I still have my 2 CDs in .TXT. I also had many CDroms/DVDroms of my favorite comic books, Star Trek had the complete comic book collection in 2000 (WIN MAC DVD-ROM) and soon I had an extensive collection. I also used Fictionwise but also Mobilereference and a very old PDF site that I don't recall. In the early days of ebooks I had many PDF files and a few LIT. My Amazon account says I have 548 ebooks (I delete most of my free books after I read them or loose interest) and the first was from June 2008 which is when the first Kindle came out.
Side note: You can get FREE travel guides (APPS) from Mobilereference on Amazon for android (FIRE owners).
http://www.amazon.com/Paris-France-F...0007667&sr=1-8