Do Androids Dream of Electric Sheep?

Having seen the movie long before I read the book, I expected it to be an action thriller. I couldn't have been further from the truth.

The book (not surprisingly) is much more nuanced. The protagonist is conflicted about his assignments and this ambiguity in his mind only increases as the story progresses. All the while, the androids seem tragically much more human (at least some of them).

It constantly challenges the book about what it is to be human. Is it our sense of empathy? our love for fellow beings? I kept wondering about it even long after I read the book.