Illuminatus! is more than a novel; it's a head trip, a philosophy course, a mirror, a funhouse; a work that should be read at least five times, because every journey through is a different trip. Equal parts mock conspiracy story, detective novel, science fiction epic and hidden treatise, what you get out of it tells you more about yourself than about the authors. On top of all that, it's just plain old damn funny. Keep your eyes open for the parodies of James Joyce, Ayn Rand and Edgar Rice Burroughs, and avoid the fnords at all costs.
Whether you're nostalgic for the 60s or lost in the compassless haze of the 90s, you need to read this book, and get to know the philosophies of its authors. There's more education between these covers than between the start and finish of any university, but it's all achieved painlessly and, by the end, you'll look at the world and yourself in a different way.
Finally, this is one of those rare books that has become less satire and more prediction in the twenty-three years since its publication. What was once cynical wit is now sad documentary, and authors Wilson and Shea have nailed it. Approach with an open mind, abandon all preconceptions ye who enter here -- and then read it again and be surprised all over as you realize it's a different book the second time around. And the third. And the fourth. And the... well, you know...