I.O.U. LOVE Love - what is it and what do you do when you're in it? Be the perfect sweetheart, and show that special someone that you care! At the back of each book there are sixteen unique Love Hearts[registered] I.O.U.s to fill out and give away to friends and family, or that someone special, as an extra-special gift. It's also packed with vital dos and don'ts, ace quizzes, some golden rules and lots of fascinating facts.