A very interesting business model. Own the books and share the books for free, they make a profit by advertising in the books. It is similar to the e-magazine but the traffics curve won't be that steep. http://bookboon.com A very interesting business model. Own the books and share the books for free, they make a profit by advertising in the books. It is similar to the e-magazine but the traffics curve won't be that steep. http://bookboon.com