This app organize a personal book catalog. The main features are the following. ・Easy to find books you [do not have]. ・Using unlimited folders, You can easily manage a lot of books. ・The input of the letter is not approximately necessary. ・Provides the ease and enjoyment of use superb. ●Easy to find books you [do not have]. This app search for books in internet and displays it [registered] on registered books. Judge immediately whether it is a registered book. So you can find books you do not