The phrase identifies a specific published literary work. The components of the phrase function as follows: “beneath” is a preposition, “a” is an article, “marble” is an adjective modifying “sky,” and “sky” and “book” are nouns. The entire phrase acts as a compound noun, representing a book title.
Titles are crucial for the identification, categorization, and marketing of creative works. This particular title, evocative in nature, likely aims to attract readers through imagery and thematic suggestions. The historical or cultural context surrounding its publication and the author’s intent contribute significantly to the work’s overall significance and impact.