This is Hearst's pride and joy: His library. According to the Hearst Castle Web site, "guests were welcome to browse through the...four thousand books. This imposing architectural space also showcases one of Mr. Hearst's most treasured collections: one hundred and fifty ancient Greek vases, all more than two thousand years old. These fragile clay vessels are displayed throughout the room and provide fascinating glimpses of daily life in ancient Greece. At 80 feet in length and filled with precious objects, the library is truly a place to get lost in."