👉 Antiquarian is a type of book or other literary work that has been out of print for many years, often due to its rarity or lack of demand. It may be considered one of the oldest books in existence and can offer unique insights into historical events and cultural practices. In literature, antiquarian literature refers to works written by authors who have lost their sources and are now looking for new ones to publish, often with a focus on historical, literary, or literary history topics.