Answer :
Final answer:
The author includes such detailed descriptions to provide depth to the story, invoking sensory imagery and setting the scene through descriptive writing.
Explanation:
The author's purpose for including these sentences in the narrative is primarily to provide further depth to the story by invoking sensory imagery and creating a more vivid and relatable experience for the reader. The description of the dusty bookshelves, the obscured books and the aged, cracking leather chair serve to set the scene and establish a certain atmosphere and mood. This is part of the narrative technique known as descriptive writing, which employs detailed visualization to engage readers' senses and emotions, thus immersing them in the story.
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