Kairos

When the drug can change reality, how do you tell what's real?
London. Early 21st Century. A Conservative government is in power in the UK, bringing increased wealth disparity, an ever-more militant police state, and rising civil discontent as the wealthy govern for themselves rather than the people.
But Breakthru - a pharmaceutical company turned religious cult - have the answer. They call it Kairos.
Kairos allows the user to not just see a different world, but shape the world to their very will. Perfect for a cult of like-minded individuals. Disastrous when it is exposed to the general public.
As disparate groups of people try to shape the world into their own image, reality itself is placed under threat. With society so divided, is there any way to pull the world back together?
Written in 1988, this remarkably prescient book received great critical acclaim.