Ebooks are books in digital format, usually .pdf, that can be downloaded and read on the screen or printed. Unlike "real" books, if ordered on the Internet, you don't have to wait several days for them to arrive at your mailbox. You get the book in only a few minutes. Creating an ebook costs almost nothing. You can bypass all the production costs such as printing and distribution.
There are best-selling ebook authors out there making insane cash from writing this kind of books. Anyone can write an ebook and sell it on the Internet! Are you interested? Then read on.