Question: What subject in his essays does the author of the 1999 American graphic novel "Bread and Wine: An Erotic Tale of New York" focus on?

Context articles: Ravi Thornton
Sabre (Eclipse Comics)
Samuel R. Delany
Bread and Wine: An Erotic Tale of New York
NBM Publishing
Lorraine Wild
American Born Chinese
Brian Ralph
Jess Fink
Tyson Hesse

Ravi Thornton is a British author, graphic novelist, playwright and founder of creative technology company Ziggy’s Wish Ltd.
 Her notable works including graphic novel "The Tale of Brin & Bent and Minno Marlybone" and multi-part project "HOAX", consisting of musical stage play "HOAX My Lonely Heart", graphic novel "HOAX Psychosis Blues", and narrative app "HOAX Our Right to Hope"; all based on the life and poetry of her late brother and now used as tools to reduce mental health stigma.
Sabre (subtitled "Slow Fade of an Endangered Species"), published in August 1978, is the title of an American graphic novel.
 Created by writer Don McGregor and artist Paul Gulacy, it was published by Eclipse Enterprises, whose eventual division Eclipse Comics would publish a spin-off comic-book series.
 It was one of the first modern graphic novels and the first to be distributed in comic book shops.
Samuel Ray Delany Jr. ( ; born April 1, 1942), Chip Delany to his friends, is an American author, professor and literary critic.
 His work includes fiction (especially science fiction), memoir, criticism, and essays on sexuality and society.
Bread and Wine: An Erotic Tale of New York (also stylized as Bread & Wine) is a 1999 American graphic novel written by Samuel R. Delany with art by Mia Wolff.
Nantier Beall Minoustchine Publishing Inc. (or NBM Publishing) is an American graphic novel publisher.
 Founded by Terry Nantier in 1976 as Flying Buttress Publications, NBM is one of the oldest graphic novel publishers in North America.
 The company publishes English adaptations and translations of popular European comics, compilations of classic comic strips, and original fiction and nonfiction graphic novels.
 In addition to NBM Graphic Novels, the company has several imprints including Papercutz with comics geared towards younger audiences, ComicsLit for literary graphic fiction, and Eurotica and Amerotica for adult comics.
Lorraine Wild was born in Ontario, Canada, but has lived in America for a greater part of her life.
 She is a graphic designer, published writer, art historian, and art instructor of design.
 In 1973, she entered the Cranbrook Academy of Art program which was, at the time, under the leadership of Michael and Katherine McCoy.
 In 1975, she received her BFA.
 Two years later, she moved to New York to work for Vignelli Associates from 1977-1978.
 During this time, she was researching the history of American graphic design post World War II.
 This personal interest of research led her to further studying at Yale University where she earned an MFA degree in 1982.
 While at Yale University, she designed "Perspecta 19", which was Yale’s architectural journal.
 Along with "Perspecta 19", she also designed the Chamber Works and Theatrum Mundi portfolios for the architect Daniel Libeskind, and the book of architect John Hejduk entitled "Mask of Medusa" in 1985.
 Her work on the designs of these books helped launch her fast-growing reputation for thoughtful and distinctive design in books on architecture, art, and design.
 Her MFA thesis entitled "Trends in American Graphic Design: 1930-1955" was recognized as an important contribution to design scholarship and led to many commissions for essays.
 During the early 1980s, she taught in the University of Houston’s architecture school.
 In 1983, she wrote "More Than A Few Questions About Graphic Design Education," which was regarded as a very influential essay.
 It was first published in "The Design Journal".
 In the article, she gives a provocative analysis which became the driving force for recharacterizing graphic design education in the United States.
 From here on, her reputation continued to soar and her work earned national recognition.
American Born Chinese is a graphic novel by Gene Luen Yang.
 Released in 2006 by First Second Books, it was a finalist for the 2006 National Book Awards in the category of Young People's Literature.
 It won the 2007 Michael L. Printz Award, the 2007 Eisner Award for Best Graphic Album: New, the "Publishers Weekly" Comics Week Best Comic of the Year, the "San Francisco Chronicle" Best Book of the Year, the 2006/2007 Best Book Award from The Chinese American Librarians Association, and Amazon.com Best Graphic Novel/Comic of the Year.
 It also made the "Booklist" Top Ten Graphic Novel for Youth, the NPR Holiday Pick, and "Time (Magazine)" Top Ten Comic of the Year.
 It was colored by cartoonist Lark Pien, who received the 2007 Harvey Award for Best Colorist for her work on the book.
Brian Ralph (born 1973) is a U.S. alternative cartoonist.
 His illustrations have appeared in "Wired" and the "New York Post".
 His debut graphic novel, "Cave-In", was nominated for three Harvey Awards, one Eisner Award, and listed as one of the "Comics Journal"'s "five best comics of 1999".
 His second graphic novel, "Climbing Out", was awarded a Xeric Grant in 2001.
 His third graphic novel, "Daybreak", was published by Drawn and Quarterly in September 2011.
Jess Fink is an American comic book creator known for her webcomic turned graphic novel "Chester 5000" and graphic novel "We Can Fix It", both published by Top Shelf Comics.
 Her work has appeared in The New York Times and North American Review among other publications.
 Fink's erotic comic book work has been featured at the Museum of Sex in New York City and on the Oh Joy Sex Toy web comic and book.
 Her work is known for being autobiographical in nature or featuring erotic scenes.
 For example, she described her work, "We Can Fix It" as "an autobiographical memoir... with a time machine" and has described her work "Chester 5000" as "an erotic, robotic, Victorian romance."
Tyson Hesse is an American graphic novel illustrator and animator, best known for his work on the "Sonic the Hedgehog" comic series from Archie Comics.
 A longtime fan of the franchise, he also lead the creation of the animated cutscenes for the 2017 platform game, "Sonic Mania".
 Hesse is the creator of the webcomic, "Diesel", and serves as writer and artist for the webcomic's follow-up graphic novel, "Diesel: Ignition".