What is VALIS? This question is at the heart of Philip K. Dick's groundbreaking novel, the first book in his defining trilogy. When a beam of pink light begins giving a schizophrenic man named Horselover Fat (who just might also be known as Philip K. Dick) visions of an alternate Earth where the Roman Empire still reigns, he must decide whether he is crazy or whether a godlike entity is showing him the true nature of the world.

On Mars, the harsh climate could make any colonist turn to drugs to escape a dead-end existence. Especially when the drug is Can-D, which transports its users into the idyllic world of a Barbie-esque character named Perky Pat. When the mysterious Palmer Eldritch arrives with a new drug called Chew-Z, he offers a more addictive experience, one that might bring the user closer to God. But in a world where everyone is tripping, no promises can be taken at face value.

When catastrophic overpopulation threatens Earth, one company offers to teleport citizens to Whale’s Mouth, an allegedly pristine new home for happy and industrious émigrés. But there is one problem: the teleportation machine only works in one direction. When Rachmael ben Applebaum discovers that some of the footage of happy settlers may have been faked, he sets out on an eighteen-year journey to see if anyone wants to come back.

Bob Arctor is a dealer of the lethally addictive drug Substance D. Fred is the police agent assigned to tail and eventually bust him. To do so, Fred takes on the identity of a drug dealer named Bob Arctor. And since Substance D, which Arctor takes in massive doses, gradually splits the user's brain into two distinct, combative entities, Fred doesn't realize he is narcing on himself.

In Radio Free Albemuth, his last novel, Philip K. Dick morphed and recombined themes that had informed his fiction from A Scanner Darkly to VALIS and produced a wild, impassioned work that sounds like a visionary alternate history of the United States. Agonizingly suspenseful, darkly hilarious, and filled with enough conspiracy theories to thrill the most hardened paranoid, Radio Free Albemuth is proof of Dick's stature as our century's greatest science fiction writer.