You'll need a library card, of course -- so if you don't already have one (more than 40% of Americans don't), borrowing free e-books might be a good reason to finally visit your public library and get a library card.

CNN: E-book lending: Your public library's best kept secret?

Then get a public library card.

FORBES: Could We All Please Shut Up About Netflix?

Today, the card is used mostly to check out library books and get into leisure centres.

ECONOMIST: Identity cards