"Moving from theory into potential, imagine reading a young adult book where the protagonist is a twelve year-old girl. Under the current system of metadata, finding another book where the lead character is another twelve year-old girl involves a great deal of digging â€“ you can narrow the field with the BISAC, but finding a characters specific age is going to require some elbow grease and a great deal of digging. However, with interior, specific metadata, a few taps can bring up an assortment of similar books.Â Interior, specific metadata also allows for comparison and contrast reading. Imagine, if you would, a modern book on the Spanish-American War. Using our future metadata system, finding a book on the same subject written during the war is an easy task. Fully leveraging the system could combine the two books â€“ side-by-side â€“ showing the differences."