Which novel by Philip K. Dick was adapted into the film 'Blade Runner'?

The novel adapted into the film Blade Runner is Philip K. Dick’s Do Androids Dream of Electric Sheep? Published in 1968, it presents a post-apocalyptic Earth where genuine animals are rare, radioactive damage has reshaped society, and highly advanced androids resemble humans.

The story follows Rick Deckard, a bounty hunter assigned to find and “retire” six escaped Nexus-6 androids. His work depends on empathy testing, since the androids are difficult to distinguish physically from people. The novel uses that investigation to question whether empathy, memory, and moral behavior truly define humanity.

Ridley Scott’s 1982 film keeps the basic premise and several characters but changes the setting, tone, terminology, and many plot details. The movie takes place mainly in a dystopian Los Angeles of 2019 and calls its artificial humans replicants. Another frequent mix-up concerns the title: “Blade Runner” came from Alan E. Nourse’s 1974 novel via a film treatment, not from Dick’s original book.