His later works, especially the "VALIS trilogy", were heavily autobiographical.The word "VALIS" is the acronym for "Vast Active Living Intelligence System"; it is the title of a novel. The theme can be found in at least three more novels.
h ɪ z WORD_BOUNDARY l eɪ t ə ɹ WORD_BOUNDARY w ɜː k s WORD_BOUNDARY ɪ s p ɛ ʃ ə l i WORD_BOUNDARY ð ə WORD_BOUNDARY v ɑ l i z WORD_BOUNDARY t ɹ ɪ l ə d̠ʒ i WORD_BOUNDARY w ɜː WORD_BOUNDARY h ɛ v i l i WORD_BOUNDARY ɔ t oʊ b aɪ ə ɡ ɹ æ f ɪ k ə l WORD_BOUNDARY ð ə WORD_BOUNDARY w ɜː d WORD_BOUNDARY v ɑ l i z WORD_BOUNDARY ɪ z WORD_BOUNDARY ð ɪ WORD_BOUNDARY æ k ɹ ə n ɪ m WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY v æ s t WORD_BOUNDARY æ k t ɪ v WORD_BOUNDARY l ɪ v ɪ ŋ WORD_BOUNDARY ɪ n t ɛ l ɪ d̠ʒ ə n s WORD_BOUNDARY s ɪ s t ə m WORD_BOUNDARY ɪ t WORD_BOUNDARY ɪ z WORD_BOUNDARY ð ə WORD_BOUNDARY t aɪ t ə l WORD_BOUNDARY ə v ə WORD_BOUNDARY n ɑ v ə l WORD_BOUNDARY ð ə WORD_BOUNDARY θ iː m WORD_BOUNDARY k æ n WORD_BOUNDARY b iː WORD_BOUNDARY f aʊ n d WORD_BOUNDARY ɪ n WORD_BOUNDARY æ t WORD_BOUNDARY l iː s t WORD_BOUNDARY θ ɹ iː WORD_BOUNDARY m ɔ ɹ WORD_BOUNDARY n ɑ v ə l z WORD_BOUNDARY