NOWADAYS, YOU CAN be instantly connected to the world, even in its remotest reaches. But in simpler analog times, things had to be planned more methodically, even when it came to leisure. Being a lighthouse keeper was a notoriously stressful and often isolated occupation. The only beacon of distraction was the traveling library, an extremely well-thought-out and curated box that doubled as a bookshelf for the keepers and their families to enjoy during those long lonely hours. These portable libraries would be moved all over the country from lighthouse to lighthouse. In the 19th century, the most coveted element of the shipment of supplies was the promise of a new case of books to read. By 1885, there were at least 420 libraries circulating between lighthouses in the U.S.