What do you think about Ebook?

What do you think about Ebook? I don't know what is this category but it's a intelligent question.

it great for looking at newspapers as well as books from early childhood that you cant find anymore it pretty neat actually

Each ebook represents 10% sales of an actual book. So ebooks are pretty much something complementary, since physical sales are way higher and more profitable. They haven't got more popular neither less, it's just... a book in digital form.

Ebook would be a nice integration into a php site where users would be able to read books online kinda like the kindle