The Question and Answer section for Blade Runner is a great resource to ask questions, find answers, and discuss the novel.
I'm sorry, this is a short-answer literature forum designed for text specific questions. We are unable to assist you with motion picture, musical scores.
Blade Runner is actually a film. The source book for it is Do Andrioids Dream of Electric Sheep byPhilip K. Dick.
The whole film is packed with meaning. There are allusions to the Bible and great works of literature throughout the film. Here are some notes:
Roy Batty - Christ-figure
Unicorn- is Deckard "real" or a replicant?
Milton's Paradise Lost- ...