Substance D - otherwise known as Death - is the most dangerous drug ever to find its way on to the black market. It destroys the links between the brain's two hemispheres, leading first to disorentation and then to complete and irreversible brain damage. Bob Arctor, undercover narcotics agent, is trying to find a lead to the source of supply, but to pass as an addict he must become a user, and soon, without knowing what is happening to him, he is as dependent as any of the addicts he is monitoring.

When a routine tour of a particle accelerator goes awry, Jack Hamilton and the rest of his tour group find themselves in a world ruled by Old Testament morality, where the smallest infraction can bring about a plague of locusts. Escape from that world is not the end, though, as they plunge into a Communist dystopia and a world where everything is an enemy. Philip K. Dick was aggressively individualistic, and no worldview is safe from his acerbic and hilarious takedowns.

In this lyrical and moving novel, Philip K. Dick intertwines the story of a toxic love affair with one about sentient robots, and unflinchingly views it all through the prism of mental illness - which spares neither human nor robot. The end result is one of Dick’s most quietly powerful works. When Louis Rosen’s electronic-organ company builds a pitch-perfect robotic replica of Abraham Lincoln, the firm is pulled into the orbit of a shady businessman, who is looking to use Lincoln for his own profit.

What happens after the bombs drop? This is the troubling question Philip K. Dick addresses with Dr. Bloodmoney, or How We Got Along After the Bomb. It is the story of a world reeling from the effects of nuclear annihilation and fallout, a world where mutated humans and animals are the norm, and the scattered survivors take comfort from a disc jockey endlessly circling the globe in a broken-down satellite.

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.

Jason Taverner - world-famous talk show host and man-about-town - wakes up one day to find that no one knows who he is - including the vast databases of the totalitarian government. And in a society where lack of identification is a crime, Taverner has no choice but to go on the run with a host of shady characters, including crooked cops and dealers of alien drugs. But do they know more than they are letting on? And just how can a person's identity be erased overnight?

Earth is trapped in the crossfire of an unwinnable war between two alien civilizations. Its leader is perpetually on the verge of death. And on top of that, a new drug has just entered circulation - a drug that haphazardly sends its users traveling through time. In an attempt to escape his doomed marriage, Dr. Eric Sweetscent becomes caught up in all of it. But he has questions: Is Earth on the right side of the war? Is he supposed to heal Earth’s leader or keep him sick? And can he change the harrowing future that the drug has shown him?

Ragle Gumm has a unique job: Every day he wins a newspaper contest. And when he isn’t consulting his charts and tables, he enjoys his life in a small town, in 1959. At least, that’s what he thinks. But then strange things start happening. He finds a phone book where all the numbers have been disconnected, and a magazine article about a famous starlet named Marilyn Monroe, whom he’s never heard of. Plus, everyday objects are beginning to disappear and are replaced by strips of paper with words written on them, like "bowl of flowers" and "soft-drink stand".

God is not dead. He has merely been exiled to an extraterrestrial planet. And it is on this planet that God meets Herb Asher and persuades him to help retake Earth from the demonic Belial. Featuring virtual reality, parallel worlds, and interstellar travel, The Divine Invasion blends philosophy and adventure in a way few authors can achieve.

On an arid Mars, local bigwigs compete with Earth-bound interlopers to buy up land before the Un develops it and its value skyrockets. Martian Union leader Arnie Kott has an ace up his sleeve, though: an autistic boy named Manfred who seems to have the ability to see the future. In the hopes of gaining an advantage on a Martian real estate deal, powerful people force Manfred to send them into the future, where they can learn about development plans.

In Counter-Clock World, time has begun moving backward. People greet each other with "goodbye", blow smoke into cigarettes, and rise from the dead. When one of those rising dead is the famous and powerful prophet Anarch Peak, a number of groups start a mad scramble to find him first - but their motives are not exactly benevolent, because Anarch Peak may just be worth more dead than alive, and these groups will do whatever they must to send him back to the grave.

Stuart Hadley is a young radio electronics salesman in early 1950s Oakland, California. He has what many would consider the ideal life: a nice house, a pretty wife, a decent job with prospects for advancement, but he still feels unfulfilled; something is missing from his life. Hadley is an angry young man - an artist, a dreamer, a screw-up. He tries to fill his void first with drinking and sex, and then with religious fanaticism, but nothing seems to be working, and it is driving him crazy.

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.

This novel, Dick said, is about Leo Runcible, "a brilliant, civic minded liberal Jew living in a rural WASP town in Marin County, California." Runcible, a real estate agent involved in a local battle with a neighbor, finds what look like Neanderthal bones in Marin and dreams of rising real estate prices because of the publicity. But it turns out that the remains are more recent, the result of an environmental problem polluting the local water supply.

Kurt Vonnegut's first novel spins the chilling tale of engineer Paul Proteus, who must find a way to live in a world dominated by a supercomputer and run completely by machines. Paul's rebellion is vintage Vonnegut – wildly funny, deadly serious, and terrifyingly close to reality.