Book Outlet has a coupon code available right now and it can score you a free book.

Sign up to Book Outlet to get a $5 off coupon code. First click here and enter your email to get your coupon code. After you sign up click here and shop for a book. Use your $5 coupon code to get any book $5 or under for free. Your coupon code will be delivered to your email.

This code is only valid for 48 hours and can only be used once. There is no minimum purchase necessary.

The shipping fee is $3.99