“What about [my] books? How do I feel about them?
I enjoyed writing all of them. But I think that if I could only choose a few, which, for example, might escape World War Three, I would choose, first, Eye in the Sky. Then The Man in the High Castle. Martian Time-Slip (published by Ballantine). Dr. Bloodmoney (a recent Ace novel). Then The Zap Gun and The Penultimate Truth, both of which I wrote at the same time. And finally another Ace book, The Simulacra.
But this list leaves out the most vital of them all: The Three Stigmata of Palmer Eldritch. I am afraid of that book; it deals with absolute evil, and I wrote it during a great crisis in my religious beliefs. I decided to write a novel dealing with absolute evil as personified in the form of a "human." When the galleys came from Doubleday I couldn't correct them because I could not bear to read the text, and this is still true.
Two other books should perhaps be on this list, both very new Doubleday novels: Do Androids Dream of Electric Sheep? and another as yet untitled Ubik]. Do Androids has sold very well and has been eyed intently by a film company who has in fact purchased an option on it. My wife thinks it's a good book. I like it for one thing: It deals with a society in which animals are adored and rare, and a man who owns a real sheep is Somebody… and feels for that sheep a vast bond of love and empathy. Willis, my tomcat, strides silently over the pages of that book, being important as he is, with his long golden twitching tail. Make them understand, he says to me, that animals are really that important right now. He says this, and then eats up all the food we had been warming for our baby. Some cats are far too pushy. The next thing he'll want to do is write SF novels. I hope he does. None of them will sell.”

"Self Portrait" (1968), reprinted in The Shifting Realities of Philip K. Dick (1995), ed. Lawrence Sutin