I was a big fan of Philip K. Dick, in my teenage years. :) but I haven't been reading him much since. I can't recommend the Man in the High Castle, since I haven't read it. I'm not sure if it's considered his best, but is probably one of his more popular novels. I liked Do Androids Dream of Electric Sheep? since it poses philosophical questions, but at the same time it manages to stay exciting. That's how I remember it :) I liked the movie as well, Blade Runner, but it has very little to do with the actual story in the novel , therefore I would consider the film as something separate.

TBH I don't read much sci-fi, I need to focus on the self-help stuff, ya feel?

Do Androids Dream of Electric Sheep? by Philip K. Dick (stole this one from Kroum our copywriter who's a huge bookworm)