So I recently had an Android unit, and jumped right away into saving my .pdf books there. Nothing beats the convenience (and just the awesomeness of it) of ebook readers. Unfortunately, ebooks come in different formats - and PDF is just not one of them. Luckily, I do have some books that comes in EPUB. =D Enjoy!
- Contracts, Specifications and Engineering Relations and Ebook and Texts Archive
- epubBooks where classics (e.g. Les Miserables) are published in digital form, "copyrighted" with Creative Commons. In other words, it's free!