Title: Black Orchids
Content:  ; 1943, New York: Grosset & Dunlap, 1943, hardcover ; 1945, Cleveland, Ohio: World Publishing Company, a Tower Book, March 1945, hardcover ; 1946, New York: Avon #95, 1946, paperback ; 1956, New York: Avon #714, 1956, paperback ; 1963, New York: Pyramid (Green Door) #R-917, September 1963, paperback ; 1992, New York: Bantam Crimeline ISBN: 0-553-25719-6 May 1992, trade paperback ; 1996, Burlington, Ontario: Durkin Hayes Publishing, DH Audio, "Black Orchids" ISBN: 0-88646-889-2 December 1996, audio cassette (unabridged, read by Saul Rubinek) ; 1998, Burlington, Ontario: Durkin Hayes Publishing, DH Audio ISBN: 0-88646-472-2 August 1998, audio cassette (unabridged, read by David Elias), "Cordially Invited to Meet Death" ; 2009, New York: Bantam Dell Publishing Group (with The Silent Speaker) ISBN: 978-0-553-38655-4 August 25, 2009, trade paperback ; 2010, New York: Bantam Crimeline ISBN: 0-307-75573-8 June 30, 2010, e-book 
Title: Black Orchids (novella)
Content:  1943, London: Collins Crime Club, July 5, 1943, hardcover ; 1943, New York: Grosset & Dunlap, 1943, hardcover ; 1945, Cleveland, Ohio: World Publishing Company, a Tower Book, March 1945, hardcover ; 1946, New York: Avon #95, 1946, paperback ; 1963, New York: Pyramid (Green Door) #R-917, September 1963, paperback ; 1992, New York: Bantam Crimeline ISBN: 0-553-25719-6 May 1992, trade paperback ; 1996, Burlington, Ontario: Durkin Hayes Publishing, DH Audio, "Black Orchids" ISBN: 0-88646-889-2 December 1996, audio cassette (unabridged, read by Saul Rubinek) ; 1998, Burlington, Ontario: Durkin Hayes Publishing, DH Audio ISBN: 0-88646-472-2 August 1998, audio cassette (unabridged, read by David Elias), "Cordially Invited to Meet Death" ; 2009, New York: Bantam Dell Publishing Group (with The Silent Speaker) ISBN: 978-0-553-38655-4 August 25, 2009, trade paperback ; 2010, New York: Bantam Crimeline ISBN: 0-307-75573-8 June 30, 2010, e-book 
Title: The Black Orchid (film)
Content:  A novelization of the screenplay was written by American author Edward S. Aarons (1916-1975) under the pseudonym Edward S. Ronns.
Title: Black Orchids (novella)
Content:  "Black Orchids" is a Nero Wolfe mystery novella by Rex Stout, first published in abridged form as "Death Wears an Orchid" in the August 1941 issue of The American Magazine. It first appeared in book form in the short-story collection Black Orchids, published by Farrar & Rinehart in 1942.
Title: Black Orchid (comic book)
Content:  Black Orchid is an American comic book written by Neil Gaiman with art by Dave McKean. It was published by DC Comics as a three-issue limited series from December 1988 to February 1989, and was later reprinted in trade paperback form. Black Orchid follows two girls, Flora and Suzy, who awaken in a greenhouse. Their journey to find out who they are leads them into contact with DC Universe figures like Batman and Swamp Thing, but also into conflict with criminal mastermind Lex Luthor, who seeks them for his own interests. Gaiman and McKean developed the series after meeting with Jenette Kahn, Dick Giordano, and Karen Berger in early 1987. The two pitched several ideas for series, but were ultimately assigned Black Orchid because all other 
Title: Black Orchids
Content: "Black Orchids" (August 1941, abridged as "Death Wears an Orchid") ; "Cordially Invited to Meet Death" (April 1942, abridged as "Invitation to Murder") Black Orchids is a Nero Wolfe double mystery by Rex Stout published in 1942 by Farrar & Rinehart, Inc. Stout's first short story collection, the volume is composed of two novellas that had appeared in abridged form in The American Magazine:
Title: Black Orchid (Doctor Who)
Content:  A novelisation of this serial, written by Terence Dudley, was published by Target Books in September 1986. An unabridged reading of the novelisation by actor Michael Cochrane was released on CD in June 2008 by BBC Audiobooks.
Title: Black Orchid (comic book)
Content:  Black Orchid began its run in December 1988 and concluded in February 1989. The series was Gaiman's first work for DC. A collected edition was published in late 1991. A hardcover deluxe edition was published on April 4, 2012, under DC's Vertigo imprint. The series received another rerelease through DC Black Label on November 12, 2019.
Title: Black Orchids (novella)
Content: 1941, The American Magazine, August 1941, abridged as "Death Wears an Orchid" ; 1943, The Philadelphia Inquirer, a Gold Seal Novel, January 10, 1943 ; New York: Lawrence E. Spivak, American Mercury #72, not dated, paperback ; 1945, Rex Stout Mystery Quarterly #1, May 1945 ; 1950, New York: Avon #256 (as "The Case of the Black Orchids"), 1950, paperback ; 1967, The Saint Magazine, January 1967 ; 1996, Burlington, Ontario: Durkin Hayes Publishing, DH Audio ISBN: 0-88646-889-2 December 1996, audio cassette (unabridged, read by Saul Rubinek) 
Title: Black Orchid (comic book)
Content:  Black Orchid has been well-received, with critics writing that, although one of Gaiman's early works, it has held up well. IGN summarized Black Orchid as a must-have and praised its writing and ending. They felt it was just "as unique and beautiful as the fictional flower that bears the title's name" and wrote that while it was not as good as Gaiman's The Sandman or Moore's Swamp Thing, it was still a fascinating and unique story. The Sequart Organization agreed and stated that it provided readers an intricate and vast world, something they considered rare for a relatively short series. Black Orchid was a commercial success. Don Markstein said that while the series did not make Black Orchid a household name, it helped expose her to many readers. The series has never been out of print since its initial publication. In addition, Black Orchid helped bolster Gaiman's career and established many themes that became common in his works.

Question: Who is the author of Black Orchids?
Answer: Rex Stout.
Rex Todhunter Stout.