The Religious Experience of Philip K. Dick by R. Crumb was originally published in Weirdo but has been posted to a Philip K. Dick website. This is a wonderful example of Crumb’s work where he is not in “shock and disgust” mode. The comic version here also really adds context through its visuals (to the extent it’s possible) to Dick’s tale of his “anamnesis” experience.
A companion link of sorts is Dick’s essay on “How To Build A Universe That Doesn’t Fall Apart Two Days Later” which is about his ideas on the nature of the world and how his writing was part and parcel of his exploration of what is real. (both links from Link Machine Go!)