The keyword term "patriot day books" is a noun phrase. In this construction, "books" serves as the head noun, identifying the core subject. The proper noun "Patriot Day" functions as a compound adjectival modifier, specifying the theme or category of the books.
This grammatical analysis relies on the concept of a noun adjunct, where a noun or noun phrase is used to modify another noun. In this case, "Patriot Day" acts attributively to answer the question, "What kind of books?" Just as "history" modifies "class" in the phrase "history class," "Patriot Day" modifies "books" to classify them as being related to that specific day of observance.
For the purpose of the article, this determination establishes that the central topic is a tangible or conceptual collection of literary works. The primary focus should be on the books themselvestheir content, authors, or relevance. The modifier "Patriot Day" defines the scope, ensuring the article's content is precisely targeted at publications connected to the commemoration rather than the event in general.
