Ubik is a 1969 science fiction novel by American writer Philip K. Dick. It is one of Dick's most acclaimed novels. It was chosen by Time magazine as one of the 100 greatest novels since 1923. In his review for Time, critic Lev Grossman described it as "a deeply unsettling existential horror story, a nightmare you'll never be sure you've woken up from.
Philip Kindred Dick (December 16, 1928 – March 2, 1982) was an American writer, who published works mainly belonging to the genre of science fiction. Dick explored philosophical, sociological and political themes in novels with plots dominated by monopolistic corporations, authoritarian governments, alternate universes, and altered states of consciousness.
“Ubik ... Safe when taken as directed.”