Harry Potter Books 1-7 – J.K. Rowling

We’ve said it before and we’ll say it again--a world without Harry and his magical friends is a hard one to picture for both adults and children alike! It’s the highest-selling series in history (450 million copies approximately), has been translated into over 67 languages and the last 4 books in the series have each gone down as the fastest selling books in history as well! We all know numbers rarely lie, in which case it’s safe to say that this might just be the most deserving series on this list.

We're not going to tell you what the series is all about, because if you don't already know, we'd love for you to get in touch and tell us about the cave you've been hiding in for the past decade!