What are categories?
Categories are groupings of books, e.g. books about animals are in the category "Animals", books about friendship in the category "Friendship" etc. Here you can find all books tagged with the respective category.
You find categories by selecting "Categories", to the left of the "Search" box in the web version, or diagonally below the search box in the app. When you have selected a category, the books included in the category are displayed.