This is a content management system for a shared library of books.
There are 3 models: Book, Category, Author
A Book has a title, author and category. A Book belongs_to an Author.
A Category has_many Author, and has_many Books.
An Author has_many Books, and has_one Category.
The Author can only edit the details of his/her own Book after login, but can view all the books.
The 10 main classes of the Dewey Decimal System are:
000—Computer science, information and general works 100—Philosophy and psychology 200—Religion 300—Social Sciences 400—Language 500—Science 600—Technology and applied science 700—Arts and recreation 800—Literature 900—History and geography