I certainly see the randomness in my work, & I also see how this fast shuffle of possibility after possibility might eventually, given enough time, juxtapose & disclose something important, automatically overlooked in more orderly thinking.
Look at the internet auction at ebay first for in your search for books by Phil Dick. Most of his books show up there eventually. If you don't find what you want, just keep going back.
Be sure to check the ratings of the sellers to be sure that they haven't been a problem to others in the past.