Books

I am of the understanding that buying books online is hardly worth anything because you don't actually own anything. Maybe you own the digital file? I'm not sure. I don't trust the longevity of it, though.

I'm told a lot (mainly by my Dad) that its a good idea to print those out to keep them. However, I'm talking about books that are easily 200+ pages.

I don't know if its worth the ink or money to print them out. At that point would it be better to just buy a book?