San Francisco Bay is the artificial and flat Treasure Island, site of the 1939 Golden Gate International Exposition. From the Second World War until the 1990s, both islands served as military bases and are now being redeveloped. Isolated in the center of the Bay is Alcatraz, the site of the famous federal penitentiary. The federal prison on Alcatraz Island no longer functions, but the complex is a popular tourist site. Despite its name, Mare Island in the northern part of the bay is a peninsula rather than an island. San Francisco Bay is thought to represent a down-warping of the Earth's crust between
Alcatraz Library Federal Bureau of Prisons booklet in 1960: "These men read more serious literature than does the ordinary person in the community. Philosophers such as Kant, Schopenhauer, Hegel, etc. are especially popular." Other authors include Jack London, Sinclair Lewis, Washington Irving, Zane Grey, Hamilton Garland, Alexandre Dumas, Daniel Defoe, Joseph Conrad, Cervantes and magazines such as "Adventure to Time", "Better Homes and Gardens" and "Library Digest". A law library was later added to A-Block. A library scene in Alcatraz appeared in the 1979 Clint Eastwood film "Escape from Alcatraz" in which Eastwood's character of Frank Morris converses with another inmate. Alcatraz