From the imposing halls of ancient Alexandria to the decorated ceilings of the Morgan Library in New York, people have developed a longstanding, enthusiastic relationship with libraries. Like no other concept and no other space, the collection of knowledge, learning, and imagination offers a sense of unlimited possibility. It is the unrivaled realm of discovery, where every worn manuscript or imposing volume can reveal a provocative new idea, a distant fantasy, an ancient belief, a religious faith, or an entirely new way of being in the world. In his new photographic journey, Massimo Listri visits some of the oldest and most exceptional libraries to reveal their architectural, historical, and fantastical marvels. Through large wooden doors, up spiral staircases, and along exceptional libraries, he guides us through stunning private, public, educational, and monastic libraries, dating back to 766. Among them, these medieval, classical, baroque, rococo, and 19th-century institutions hold some of the most valuable records of human thought and action, written and printed in manuscripts, volumes, scrolls, and incunabula. In each library, Listri’s composed images capture the library's unique atmosphere, as well as the most precious exhibits and design details. The libraries featured include the papal collections of the Vatican Apostolic Library, the Trinity College Library, home to the Book of Kells and the Book of Durrow, and the collections of the Laurentian Library in Florence, the private library of the powerful House of Medici, designed by Michelangelo. With meticulous descriptions accompanying each library presentation, we learn not only about their astonishing treasures—which are continuously illustrated—but also about their often lively, tumultuous, or controversial histories. Like the Altenburg Library in Austria, an outpost of the imperial Catholic Church repeatedly destroyed during the European religious wars, or the Franciscan Monastery in Lima, Peru, with its troves of Inquisition records. At the same time, a delight for book lovers, an ode to knowledge, and a version of the particular magic of printing, Massimo Listri. The World's Best Library is above all a cultural-historical pilgrimage into the heart of the halls of learning, to the stories they tell, as well as to those they gather in printed materials along polished shelves.