You create the custom column in the usual way, using Preferences -> Add your own columns. Setup ¶īy now, your question might be “How was all of this setup?” There are three steps: 1) create the custom column, 2) tell calibre that the new column is to be treated as a hierarchy, and 3) add genres. You can also apply genres in the metadata editors more on this below. Once a genre exists, that is at least one book has that genre, you can easily apply it to other books by dragging the books from the library view onto the genre you want the books to have. David Weber’s Honor Harrington books could be in “Science Fiction.Military”, and for that matter also in “Science Fiction.Space Opera.” For example, the books in Winston Churchill’s “The Second World War” could be in “History.Military”. A book can be in one, the other, or (doubtfully in this case) both. Because the genres are in a hierarchy, these are two separate genres. Searching is discussed in more detail below.Īnother thing you can see from the image is that the genre Military appears twice, once under History and once under Science Fiction. If a book has both Space Opera and Military genres, then you will see that book if you click on either genre. Of course, a book can have multiple genres. Clicking on Alternate History will give books in that genre, ignoring those in Military and Space Opera. For example, clicking on Science Fiction can give all three of the child genres, Alternate History, Military, and Space Opera.
Clicking on that triangle will open the item and show the sub-genres, as you can see with History and Science Fiction.Ĭlicking on a genre can search for all books with that genre or children of that genre. Genres containing sub-genres appear with a small triangle next to them. In this example the outermost level (Genre) is a custom column that contains the genres.
īy using the hierarchy feature, you can see these genres in the Tag browser in tree form, as shown in the screen image.
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