Question: In what year was Robert M. Pirsig's most famous book first published?

Context paragraphs:
Neal Samors: Samors has authored, co-authored and/or published twenty five books about Chicago's neighborhoods, downtown, Michigan Avenue, the Chicago River, Lake Shore Drive, and Chicago's airports, and in addition has written and published nostalgic books about growing up in Chicago in the eras of the 1930s, 1940s, 1950s, and 1960s.  His book, co-authored with Michael Williams, "The Old Chicago Neighborhood: Remembering Chicago in the 1940s", won the 2003 Independent Publisher Book Award first place award in history, his book "Chicago in the Sixties: Remembering a Time of Change" won the 2007 Independent Publisher Book first place award in history, his book, "Downtown Chicago in Transition", co-authored with Eric Bronsky, won the 2008 Independent Publisher Book second place award for Midwest Region books, and his book, "The Rise of The Magnificent Mile," (co-authored with Eric Bronsky), won the 2009 Independent Publisher Book first place award in the Great Lakes region.  He co-authored and published three new books in 2008, including "Clark Weber's Rock and Roll Radio", by Clark Weber, "Never Put Ketchup On A Hot Dog", by Bob Schwartz, and "The Rise of the Magnificent Mile", co-authored with Eric Bronsky.  In 2010, he published and/or co-authored, with Tony Macaluso and Julia S. Bachrach, "Sounds of Chicago's Lakefront: A Celebration of the Grant Park Music Festival, "A Kid From The Windy City," co-authored by Lee B. Stern and Neal Samors, and "Paths Through The Wilderness: American Indian Trail Marker Trees" by Dennis Downes, with Neal Samors.  Next, he was the publisher and co-author of "Chicago's Lake Shore Drive: Urban America's Most Beautiful Roadway" and served as publisher of "Chicago From The Sky: A Region Transformed" by Lawrence Okrent.  In 2011, he published and co-authored, "Chicago's Classic Restaurants: Past, Present and Future" with Eric Bronsky and Robert Dauber, in 2013 he published and co-authored "Chicago's River At Work And At Play" with Steven Dahlman, and, in 2015, he published and co-authored "Now Arriving: Traveling To And From Chicago By Air, 90 Years of Flight" with Christopher Lynch.  Dr. Samors publishes books through his company, Chicago's Books Press, an imprint of Chicago's Neighborhoods, Inc.  He has a PhD and MALS from Northwestern University, an MA from Northern Illinois University and a BA from the University of Wisconsin–Madison.  In 2010, Dr. Samors was selected as a Prominent Alumnus by the Sullivan High School Alumni Association.

Satya Mohan Verma: Satya Mohan Verma is an Indian poet.  Born in December 1933 at Damoh and named “Mohan” on "Mahatma Gandhi" by his Gandhian father.  Verma completed his studies from "Saugor University" and chooses teaching as his career.  He first came in scene on a kavi sammelan with Vrindavan Lal Verma and then with the motivation of "Bhavani Prasad Mishra" first joint collection of poems with Vitthalbhai Patel and "Dinkar Sonwalkar" “Deewaron Ke Khilaaf” was published.  He organized the mega literary event “Sarjana-77” the biggest and memorable event in Bundelkhand area.  His book on small poems named "Pal Do Pal" was very popular in early 70s.  About his another book Vikalp Ka Samikaran Dr. Harivansh Rai Bachhan said that “poems of Satyamohan are as soft as his personality”.  His book “Vyom-Dharma” gained lot of critical acclaim and became his signature.  He did translation of English poems of several famous poets such as Robert Frost, Pablo Neruda etc. in Hindi and “Chintan” the official diary of SPIC MACAY.  He also edited the famous book Karm Sanyasi Krishna written by his father.  He is the writer of "Bundeli Gaan" 'veer bundeli dharti par pahun pag dhaaro ju' sung by famous singer Vinod Rathore.

Robert M. Pirsig: Robert Maynard Pirsig (September 6, 1928 – April 24, 2017) was an American writer and philosopher.  He was the author of the philosophical novels "Zen and the Art of Motorcycle Maintenance: An Inquiry into Values" (1974) and "" (1991).

Zen and the Art of Motorcycle Maintenance: Zen and the Art of Motorcycle Maintenance: An Inquiry into Values (ZAMM), by Robert M. Pirsig, is a book that was first published in 1974.  It is a work of fictionalized autobiography, and is the first of Pirsig's texts in which he explores his Metaphysics of Quality.

Abecedar: The Abecedar was a school book first published in Athens, Greece in 1925.  The book became the subject of controversy with Bulgaria and Serbia when cited by Greece as proof it had fulfilled its international obligations towards its Slavic-speaking minority, because it had been printed in the Latin alphabet rather than the Cyrillic used by the Slavic languages of the southern Balkans.  The book was initially published for the Slavic Macedonians in the Lerin dialect, and today it is published in Standard Macedonian, Standard Greek and Standard English.

Reisehaandbog over Norge: Reisehaandbog over Norge is a Norwegian travel guide book first published in 1879 by Yngvar Nielsen.  It was re-issued in twelve different editions between 1879 and 1915.  The guide book became quite popular, and played an important role in the development of tourism in Norway.  An English edition of the guide book was published in 1886.

1001 Albums You Must Hear Before You Die: 1001 Albums You Must Hear Before You Die is a musical reference book first published in 2005 by Universe Publishing.  It compiles writings and information on albums chosen by a panel of music critics to be the most important, influential, and best in popular music between the 1950s and the 2000s.  The book was edited by Robert Dimery, an English writer and editor who had previously worked for magazines such as "Time Out" and "Vogue".

The German Shepherd Dog in Word and Picture: The German Shepherd Dog in Word and Picture is a book first published in 1923.  The book is a revised translation from German into English of Der deutsche Schäferhund in Wort und Bild which was written by Max von Stephanitz (the founder of the German Shepherd Dog breed) and first published in 1901 as a 72-page booklet (plus 24 pages of advertising).  Der deutsche Schäferhund in Wort und Bild was subsequently expanded with later editions, and a complete makeover was published in 1921 with the sixth edition.  A seventh edition of the German book was published in the same year as the first editions in English, 1923.

The World of Yesterday: The World of Yesterday: Memories of a European (German title Die Welt von Gestern: Erinnerungen eines Europäers) is the memoir of Austrian writer Stefan Zweig.  It is considered the most famous book on the Habsburg Empire.  He started writing it in 1934 when, anticipating Anschluss and Nazi persecution, he uprooted himself from Austria to England and later to Brazil.  He posted the manuscript, typed by his second wife Lotte Altmann, to the publisher the day before they both committed suicide in February 1942.  The book was first published in Stockholm (1942), as "Die Welt von Gestern".  It was first published in English in April 1943 by Viking Press.  In 2011, Plunkett Lake Press reissued it in eBook form.

King's American Dispensatory: King's American Dispensatory is a book first published in 1854 that covers the uses of herbs used in American medical practice, especially by those involved in Eclectic medicine which was the botanical school of medicine in the 19th to 20th centuries.  In 1880 John Uri Lloyd, without a doubt, the most famous and accomplished eclectic pharmacist of the late 19th and early 20th centuries, promised his friend, Professor King, to revise the pharmaceutical and chemical sections of the "American Dispensatory".  Eighteen years later an entirely rewritten eighteenth edition (third revision) was published in 1898.  It was co-authored by eclectic physician Harvey Wickes Felter, M.D.

Supporting paragraphs: Zen and the Art of Motorcycle Maintenance Robert M. Pirsig
Answer: 1974