I know you've started reading a book only to remember three chapter in that you already read it. You need a book tracker, not only to make sure you don't accidentally read a book twice, (unless you want to) but also to keep track of your ratings, to tally up your monthly and yearly number of books read, and to have all of your favorite books in one place. This is not only an amazing tool for you to use but it also makes a great gift to all your book friends.