Title: A Separate Reality
Content: Castaneda, Carlos. The Teachings of Don Juan: A Yaqui Way of Knowledge, 30th Anniversary Edition. New York: Washington Square Press, 1998 ; Castaneda, Carlos. A Separate Reality. New York: Pocket Books, 1971 ; Parada, Sergio. Guardians of the Separate Reality. New York: Lulu Press, 2010 
Title: A Separate Reality
Content:  A Separate Reality: Further Conversations With Don Juan is a book written by anthropologist/author Carlos Castaneda, published in 1971, concerning the events that took place during his apprenticeship with a Yaqui Indian Sorcerer, Don Juan Matus, between 1960 and 1965. In the book Castaneda continues his description of his apprenticeship under the tutelage of Don Juan. As in his previous book, The Teachings of Don Juan: A Yaqui Way of Knowledge, Castaneda describes the experiences he has with Don Juan while under the influence of the psychotropic plants that Don Juan offered him, peyote (Lophophora williamsii) and a smokable mixture of what Castaneda believed to be, among other plants, dried 
Title: Quantum Reality
Content:  Quantum Reality is a 1985 popular science book by physicist Nick Herbert, a member of the Fundamental Fysiks Group which was formed to explore the philosophical implications of quantum theory. The book attempts to address the ontology of quantum objects, their attributes, and their interactions, without reliance on advanced mathematical concepts. Herbert discusses the most common interpretations of quantum mechanics and their consequences in turn, highlighting the conceptual advantages and drawbacks of each.
Title: Reality and Dreams
Content:  Reality and Dreams is a novel by Scottish author Muriel Spark, published in 1996. It was identified by the New York Times Book Review as one of the notable books of 1997.
Title: Bibliography of Jane Roberts
Content:  SETH BOOK) ; (Channeled 1972-1973) (Published 1974). The Nature of Personal Reality. Prentice-Hall.  Reprinted 1994, Amber-Allen Publishing. ISBN: 1-878424-06-8. (A SETH BOOK) ; (Channeled 1974) (Published 1977). The "Unknown" Reality Vol. 1. Prentice-Hall. Reprinted 1997, Amber-Allen Publishing.  ISBN: 1-878424-25-4. (A SETH BOOK) ; (Channeled 1974-1975) (Published 1979). The "Unknown" Reality Vol. 2. Prentice-Hall. Reprinted 1997, Amber-Allen Publishing.  ISBN: 1-878424-26-2 . (A SETH BOOK) ; (Channeled 1975-1977) (Published 1979). The Nature of the Psyche: Its Human Expression. Prentice-Hall. Reprinted 1996, Amber-Allen Publishing.  ISBN: 1-878424-22-X. (A SETH BOOK) ; (Channeled 1977-1979) (Published 1981). The Individual and the Nature of Mass Events. Prentice-Hall, ISBN: 0-13-457259-9.  Reprinted 1994, 
Title: A Sense of Reality
Content:  A Sense of Reality is a collection of short stories by Graham Greene, first published in 1963. The book is composed of three short stories and a novella, Under the Garden. These stories share a marked change of style from Greene’s usual format, with the author plunging into fantasy, dreams, false memories and imagination.
Title: Reality tunnel
Content:  Reality tunnel is a theory that, with a subconscious set of mental filters formed from beliefs and experiences, every individual interprets the same world differently, hence "Truth is in the eye of the beholder". It is similar to the idea of representative realism, and was coined by Timothy Leary (1920–1996). It was further expanded on by Robert Anton Wilson (1932-2007), who wrote about the idea extensively in his 1983 book Prometheus Rising. Wilson and Leary co-wrote a chapter in Leary's 1988 book Neuropolitique (a revised edition of the 1977 book Neuropolitics), in which they explained further: "The gene-pool politics which monitor power struggles among terrestrial humanity are transcended in this info-world, i.e. seen as static, artificial charades. One is neither coercively manipulated into another's territorial reality nor forced to struggle against it with reciprocal game-playing (the usual soap opera dramatics). One simply elects, consciously, whether or not to share the other's reality tunnel."
Title: The Reality Dysfunction
Content:  The Reality Dysfunction is a science fiction novel by British writer Peter F. Hamilton, the first book in The Night's Dawn Trilogy. It is followed by The Neutronium Alchemist and The Naked God. It was first published in the United Kingdom by Macmillan Publishers on 26 January 1996. The first US edition, which was broken into two volumes, Emergence and Expansion (the UK paperback is not), followed in July and August 1997 from Time Warner Books. The second US edition, published by Orbit Books in October 2008, is published in a single volume. In some countries, the paperback editions were split into two (Germany and the United States), three (France) or four volumes (Italy and Portugal) per book. Usually the first volume is a translation of "Emergence".
Title: Grimm Reality
Content:  Grimm Reality is a BBC Books original novel written by Simon Bucher-Jones and Kelly Hale and based on the long-running British science fiction television series Doctor Who. It features the Eighth Doctor, Fitz and Anji. The novel's secondary title is The Marvellous Adventures of Doctor Know-All.
Title: Reality Hunger
Content:  Reality Hunger: A Manifesto is a non-fiction book by American writer David Shields, published by Knopf on February 23, 2010. The book is written in a collage style, mixing quotations by the author with those from a variety of other sources. The book's manifesto is directed toward increasing art's engagement with the reality of contemporary life through the exploration of hybrid genres such as prose poetry and literary collage. In Vanity Fair, Elissa Schappell called Reality Hunger "a rousing call to arms for all artists to reject the laws governing appropriation, obliterate the boundaries between fiction and nonfiction, and give rise to a new modern form for a new century."

Question: Who is the author of A Separate Reality?
Answer: Carlos Castañeda.
Carlos Castaneda.