Ebooks: do you really own them?

When you buy e-books with DRM, you are not completely free to copy them to your devices or lend them to your friends.

So why do e-libraries have "BUY" buttons?

You're not actually buying them; technically, you're buying a license to read them on certain devices under certain conditions.

When you buy a paper book, you can do whatever you want with it. You can read it and then lend it to your friends. After 30 years, you still own it.

There's a huge difference.