Radio Free Albemuth

Science fiction novel, a wild and visionary alternate history of the United States. It is 1969, and a paranoid president has convulsed America in a vicious war against imaginary internal enemies. As the country slides into fascism, a struggling science-fiction writer named Philip K. Dick is trying to keep from becoming one of that war's casualties. Meanwhile, Dick's best friend, a record executive named Nicholas Brady, is receiving transmissions from an extraterrestrial intelligence, which he dubs Valis, who apparently wants him to overthrow the president.