1 over 2 million books from public domain book catalog such as Gutenberg, Feedbooks, Internet Archive, Baen Books, Smashwords.
2 you can open books in iBooks、Kindle and many other ebook reader apps you like.
3 add custom book catalog
4 search and download books from websites by the search engine you like.
All books are public domain books, so it is legal.
fix the bug of downloading book from tuebl catalog