If it is only an abstract concept, it can sometimes be omitted. For example, I want to buy a book of Tang poetry. I like Tang poetry very much. The latter does not refer to a specific book, but a summary of Tang poetry, and I don't need to add it.
The title of a book is a symbol used to represent the names of books, articles, newspapers, archives, operas, songs, pictures, etc. The title of a book indicates the name of a book, document, newspaper, article, etc. , but also used in songs, movies, TV dramas and other literary and artistic works closely related to the written media. When there is a title in the title, the outer layer uses a double title and the inner layer uses a single title. If there is a title in a single title, use a double title in a single title.