Here are some suggested books and films about this topic. Not all of them are easy to obtain, but we've tried to link places to find them.
Founded by San Francisco newspapermen around the turn of the century. what distinguishes this club from others just as prestigious, though, is the Grove, the summer encampment held every July on 3000 isolated acres of redwood forest north of the Bay Area for which the great and powerful from around the world interrupt their affairs, if only for a weekend.
The Bohemian Grove and other retreats: A study in ruling-class cohesiveness by G. William Domhoff.
They secretly meet for seventeen days each July at a place called the Bohemian Grove, a remote forest of ancient redwood trees in the deep Northern California woods. The Bohemian Club's membership rolls include current and former U.S. Presidents, heavy-hitting corporate chieftains, and high government officials. Mingling among them are a number of Hollywood movie stars, Broadway producers, famous musicians, authors, painters and poets. These are America's most powerful men.