No, the word ‘book’ is not a proper noun; it is a common noun. Proper nouns refer to specific names of people, places, organizations, or sometimes things, and they are always capitalized. For example, words like ‘Harry Potter,’ ‘New York,’ or ‘Harvard University’ are proper nouns because they specify unique entities.
On the other hand, ‘book’ refers to a general category of written works and does not specify a unique title or author. You can have many different books, like ‘The Great Gatsby,’ ‘1984,’ or ‘Moby Dick,’ each of which would be a proper noun. But the term ‘book’ itself is generic and can apply to any written content bound together.
In summary, ‘book’ is a common noun because it describes a general class of items, while specific titles of books would be considered proper nouns.