The Illuminatus! trilogy - Robert Shea

It was a deadly mistake. Joseph Malik, editor of a radical magazine, has snooped into rumours about an ancient secret society that turned out to be still alive and kicking. Now his offices have been bombed, he's gone missing, and the case has landed in the lap of a tough, cynical, streetwise New York detective.

Saul Goodman knows he's stumbled onto something big -
but even he can't guess how far into the pinnacles of power this conspiracy of evil has penetrated. Brimming with sex and violence - in and out of time and space - the three books of The Illuminatus! Trilogy are only partly works of the imagination. They tackle all the important cover-ups of our time - from who really shot the Kennedys to why there's a pyramid on the one-dollar bill - and suggest a truly mind-blowing reality.