A legal drama or a courtroom drama is a subgenre of drama and crime fiction.
 Law enforcement, crime, detective-based mystery solving, lawyer work, civil litigation, etc., are all possible focuses of legal dramas.
 Common subgenres of legal dramas include detective dramas, police dramas, courtroom dramas, legal thrillers, etc.
 Legal dramas appear in many forms of media, including novels, plays, television shows, and films. Legal drama sometimes overlap with crime drama, most notably in the case of "Law & Order".
 Most crime drama focus on crime investigation and does not feature the court room.
 An early example of this overlapping form was Erle Stanley Gardner's Perry Mason, in which the eponymous trial lawyer would usually defend his clients from their murder charges by investigating the crime before the trial, and dramatically revealing the actual perpetrator during the closing courtroom scene, by calling some other person to the stand and interrogating him or her into confessing in open court:
Maisie Raine is a British television crime drama series, first broadcast on BBC One, that ran from July 28, 1998 to July 9, 1999.
 Pauline Quirke starred as the eponymous title character, an unorthodox detective whose hands on yet down-to-earth approach is not always appreciated by her superiors.
 Created by Stephen Bill, a total of twelve episodes were broadcast across two series.
 The first series featured a running story arc involving Maisie's wayward brother Kelvin (Paul Reynolds), and had a much lighter feel than the second, which featured grittier storylines including drug dealing, armed robbery, arson and murder.
Killer Women is an American crime drama television series that aired on ABC from January 7 to March 25, 2014.
 The series is based on the Argentine crime drama "Mujeres Asesinas", which was adapted into an American setting by writer Hannah Shakespeare.
 Shakespeare also serves as an executive producer alongside Sofía Vergara, Ben Silverman, Luis Balaguer, and Martin Campbell for Pol-Ka Productions, Silverman's Electus Productions, Vergara and Balaguer's Latin World Entertainment, and ABC Studios.
 The pilot episode was directed by Lawrence Trilling.
"The Fall" is a British-Irish crime drama television series filmed and set in Northern Ireland.
 The series is produced by Artists Studio and created by Allan Cubitt.
 It premiered in the Republic of Ireland on RTÉ at 9:30 pm on 12 May 2013, and in the United Kingdom on BBC Two at 9:00 pm on 13 May 2013.
 The series stars Gillian Anderson as DSI Stella Gibson, a senior Metropolitan Police Detective and Jamie Dornan as serial killer Paul Spector.
Quirke is a British-Irish crime drama television series that was first broadcast on BBC One and RTÉ One in 2014.
 The three-part series is based on the Quirke novels by John Banville, writing under the pseudonym Benjamin Black, and was adapted by Andrew Davies and Conor McPherson.
William John Banville (born 8 December 1945), who writes as John Banville and sometimes as Benjamin Black, is an Irish novelist, adapter of dramas, and screenwriter.
 Recognised for his precise, cold, forensic prose style, Nabokovian inventiveness, and for the dark humour of his generally arch narrators, Banville is considered to be "one of the most imaginative literary novelists writing in the English language today."
 He has been described as "the heir to Proust, via Nabokov."
The Fall is a British-Irish crime drama television series filmed and set in Northern Ireland.
 The series is created and written by Allan Cubitt, produced by Artists Studio, and shown on RTÉ One in the Republic of Ireland and BBC Two in the UK.
 It stars Gillian Anderson as DSI Stella Gibson and Jamie Dornan as serial killer Paul Spector.
Trojan Eddie is a 1996 British-Irish crime drama film directed by Gillies MacKinnon.
Missing is a British daytime television crime drama series starring Pauline Quirke and Mark Wingett.
 The series is set in a busy, under-resourced missing persons unit, and follows the team led by DS Mary Jane "MJ" Croft (Quirke).
 The first series of five episodes aired on BBC One in 2009, with an extended second series of ten episodes airing in 2010.
 It was filmed in and around Dover, Kent and Tonbridge, Kent.
 The series also starred Felix Scott and Pooja Shah as Croft's sidekicks, Jason Doyle and Amy Garnett.
 Guest stars who appeared throughout the series run include Paul Nicholas, Brooke Kinsella, Gary Lucy and Sylvia Syms.
Longmire is an American modern Western crime drama television series that premiered on June 3, 2012 on the A&E network.
 The series was developed by John Coveny and Hunt Baldwin.
 It is based on the "Walt Longmire Mysteries" series of mystery novels written by best-selling author Craig Johnson.

Question: What is the nationality of the author who wrote the novels on which the British-Irish crime drama television series Quirke is based?
Answer: Irish