You can buy text books outside of school. Let's say I buy some OReilly or Manning e-books, and then they take them away from me. Whereas the physical copy for j

You can buy text books outside of school. Let's say I buy some OReilly or Manning e-books, and then they take them away from me. Whereas the physical copy for just a little bit extra remains mine for as long as the copy stays readable (centuries if given care)