Question: How many detective novels did the author of the play Black Coffee write ?

Context paragraphs:
Black Coffee (1948 song): "Black Coffee" is a song.  The music was written by Sonny Burke (based on the 1938 piece "What's Your Story Morning Glory" composed by Mary Lou Williams), the lyrics by Paul Francis Webster.  The song was published in 1948.  Sarah Vaughan charted with this song in 1949 on Columbia.  Peggy Lee first released her version in 1953, and in 1956 it was included on her debut album "Black Coffee".  It was included in the soundtrack for the 1960 Columbia Pictures feature "Let No Man Write My Epitaph", recorded on Verve by Ella Fitzgerald, also in 1960.  The version by Ella Fitzgerald was a favourite song of Polish Nobel Prize laureate Wisława Szymborska who chose it as the song to be performed at her funeral.

Stefan Brockhoff: Stefan Brockhoff is a pseudonym that was used "collectively" by a group of three German co-authors of several detective novels, all of them having certain characteristics in common: they were all born in Germany at or about the beginning of the second decade of the twentieth century; at one point or another they all of them became refugees from Nazism; and they all eventually lived out their lives in the United States of America.  Moreover, to every one of them the writing of detective novels was a youthful avocation, their principal interests and activities in later life lying in different areas.

Black Coffee (DJ): Black Coffee (born Nkosinathi Maphumulo on 11 March 1976) is a South African record producer and DJ.  He began his career around 1995 and has released five albums as well as a live DVD under his Johannesburg-based record label, Soulistic Music.  He is arguably the most prominent electronic music producer in Africa.  Black Coffee had his big break shortly after being chosen as a participant in the 2004 Red Bull Music Academy held in Cape Town.  In September 2015, he won the "Breakthrough DJ Of The Year" award at the DJ Awards in Ibiza, a few weeks after the release of his fifth studio album, "Pieces Of Me".

Agatha Christie: Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE ("née" Miller; 15 September 1890 – 12 January 1976) was an English crime novelist, short story writer and playwright.  She is best known for her 66 detective novels and 14 short story collections, particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple.  She also wrote the world's longest-running play, a murder mystery, "The Mousetrap", and six romances under the name Mary Westmacott.  In 1971 she was elevated to Dame Commander of the Order of the British Empire (DBE) for her contribution to literature.

Wiener Melange: A Wiener Melange (German for "Viennese Blend") is a speciality coffee drink similar to a cappuccino.  The difference is sometimes assumed to be that the "Melange" is made with milder coffee but the Viennese coffee company Julius Meinl describes a "Wiener Melange" as "one espresso shot served in a large coffee cup topped with steamed milk and milk foam".  Cafe Sabarsky in Manhattan concurs.  At Cafe Sperl in Vienna, the "Melange" is half a cup of "black coffee" and half a cup "creamy milk", topped with milk foam.  Nescafe, Movenpick, and Lufthansa Catering however serve Wiener Melange as Coffee blended with Cocoa - no matter whether foam topped or not.  Kaffeehaus de Chatillon describes it as relatively equal portions of coffee, milk and cream foam in a 6oz cup.

Black Coffee Blues: Black Coffee Blues is a book written by Henry Rollins, comprising writings penned between 1989 and 1991.  It is composed of seven parts; "124 Worlds", "Invisible Woman Blues", "Exhaustion Blues", "Black Coffee Blues", "Monster", "61 Dreams" and "I Know You".  It was published in 1992 by 2.13.61 Publications, Rollins' own publishing house.

Black Coffee (1931 film): Black Coffee is a 1931 British detective film directed by Leslie S. Hiscott, and based on the play "Black Coffee" by Agatha Christie featuring her famous private detective Hercule Poirot.  It starred Austin Trevor as Poirot with Richard Cooper playing his companion Captain Hastings.

Ved Prakash Sharma: Ved Prakash Sharma (10 June 1955 – 17 February 2017) was an Indian writer of novels and screenplays in Hindi.  He was born in Meerut, Uttar Pradesh, where he completed his graduation from NAS Degree College.  Having begun his professional career as a ghost writer, he went on to write 176 novels (ghostwriting around 23 novels of them).  "Dahekte Shaher" (1973) was the first novel Sharma got credit for.  He primarily wrote detective novels, among them "Kalyug ki Ramayan" and "Vardi Wala Gunda".  The main characters in his detective novels were Vijay, Vikas, Alphanse, Vibha Jindal, Keshav pandit and Raina.  According to his "Times of India" obituary his 1992 novel "Vardi Wala Gunda" "broke all records and sold 15 lakh copies on the very first day of its release", while the "Hindu" reported overall sales of "more than eight crore copies".

Xylosandrus compactus: Xylosandrus compactus is a species of ambrosia beetle.  Common names for this beetle include black twig borer, black coffee borer, black coffee twig borer and tea stem borer.  The adult beetle is dark brown or black and inconspicuous; it bores into a twig of a host plant and lays its eggs, and the larvae create further tunnels through the plant tissues.  These beetles are agricultural pests that damage the shoots of such crops as coffee, tea, cocoa and avocado.

The Lacquered Box: The Lacquered Box (French: Le coffret de laque) is a 1932 French crime film directed by Jean Kemm and starring Danielle Darrieux.  It was based on Agatha Christie's play "Black Coffee" which had been turned into a British film the previous year.

Supporting paragraphs: The Lacquered Box Agatha Christie
Answer: 66