Anne Fadiman, in her book "Ex Libris: Confessions of a Common Reader," explores the concept of an "Odd Shelf" within personal libraries. This shelf consists of books that seem out of place amidst the owner’s other literary choices, holding unique and often unrelated subjects. These unexpected volumes, however, can provide deeper insights into the reader’s personality and interests.

Fadiman suggests that these peculiar selections contribute to the richness of one’s literary collection. They may reflect hidden passions or experiences that, while not immediately apparent, offer a glimpse into the reader's identity. Ultimately, the Odd Shelf becomes a testament to the complexity of individual tastes and the multifaceted nature of reading itself.