Private libraries are collections of books and other reading materials owned by individuals or families, rather than public institutions. These libraries can vary in size, from a small collection of cherished titles to extensive archives containing rare and valuable works. They often reflect the personal interests and tastes of their owners, showcasing genres such as fiction, history, or art. Many private libraries serve as personal retreats or study spaces, allowing owners to enjoy their collections in a comfortable environment. Some notable examples include the Morgan Library & Museum in New York, which began as the private library of financier J.P. Morgan, and the Bodleian Library at the University of Oxford, which houses many private collections.