Not all books can be added
I searched for a few different books to add and it didn’t find them. I’m guessing those books aren’t in whatever database this pulls from but the app also doesn’t given you the option at add them manually. These weren’t books that aren’t well known, they’re pretty popular so I’m surprised they couldn’t be found. An example was it didn’t find any books by the Author John Marrs. I can’t rate anything else about the app as couldn’t add a book to try it out!