When you come across a book which you especially loved to read, and you'd like to find it again in the future to read it again or to show it to your friends, you might consider putting it on your favorites list.
In your "Read" menu, you'll find the option "My favorites", which offers you an overview of all your favorite books.
Unlike with bookmarks, the book you favorite will be marked with a little heart, visible to everyone, and its author will receive a small but significant boost of Fairy Dust. Therefore, your favorite list is not only a handy way to keep track of all the books you love, but also a great way to reward Bücher that won a special place in your heart.
Even though it is openly visible how many times a book has been favorited, your list of favorites will always be secret. Nobody except yourself has access to your list.