I came across this great listing at mysterylovers.com and it occurred to me this provides an amazing listing to create your customized World Mystery Book Tour.  Check out the variety available.

Italy
    Grace Brophy writes the Alessandro Cenni series, Commisario, state police of Umbria, Italy
    Andrea Camilleri writes the Inspector Montalbano series, detective, Sicily
    Michael Dibdin writes thethe Aurelio Zen series, Italian police inspector, various Italian locations
    Conor Fitzgerald writes the Alec Blume, ex-pat American and Commisario of Police, Rome
    Michele Giuttari writes the Michele Ferrara, Squadra Mobile, Florence, Italy
    David Hewson writes the Nic Costa series, police detective, Rome, Italy
    Christobel Kent writes the Sandro Cellini, cop turned PI, Florence, Italy
    Donna Leon writes the Guido Brunetti series, police inspector Venice
    Carlo Lucarelli writes the Commissario De Luca series, policeman in post-Mussolini Italy
    Carlo Lucarelli writes the Grazia Negro series, police inspector, Bologna
    Beverle Graves Myers writes the Tito Amato series, castrato opera singer, 18th century Venice
    Magdalen Nabb writes the Salvatore Guarnaccia series, Carabinieri Marshall, Florence
    John Maddox Roberts writes the Decius Caecillius Metellus, sleuth in ancient Rome
    Steven Saylor writes the Gordianus the Finder, an early PI in ancient Rome in the time of Caesar
    Valerio Varesi writes the Commisario Soneri, Parma, Italy
    Marco Vichi writes the Inspector Bordelli, Florence in the '60s
    Jan Merete Weiss writes the Natalia Monte, police captain, Naples, Italy
France (plus Belgium)
    Cara Black writes the Aimee LeDuc series, Franco-American PI in Paris
    Michael Bond writes the Monsieur Pamplemousse series, French culinary critic
    Alexander Campion writes theCapucine Tellier, policemwoman married to food critic, Paris
    Claude Izner writes the Victor Legris, bookseller in 19th century Paris
    Gerald Jay writes the Inspector Paul Mazarelle, Paris cop now in the Dordogne region
    M.L. Longworth writes the Antoine Verlaque, magistrate Aix-en-Provence
    Adrian Magson writes the Inspector Lucas Rocco, 1960's Picardie France
    Peter May writes the Enzo MacLeod series, Scottish forensic scientist, Toulouse, France         
    Georges Simenon writes the Maigret series, police detective, Paris, France---220 mysteries
    Peter Steiner writes the Louis Morgan and Jean Renard, retired CIA agent and village cop in south of France
    Fred Vargas writes the Det. Commissaire Jean-Baptise Adamsberg series, Paris, France
    Martin Walker writes the Bruno Courreges, chief of police, south of France
    Michelle Wan writes the Mara Dunn series, sleuth, Dordogne
  Pieter Aspe writes the Inspector Pieter Van, Bruge Belgium
 
Germany & Austria
    Jakob Arjouni writes the Turkish-German PI Kemal Kayankaya
    Rebecca Cantrell writes the Hannah Vogel, journalist in pre-war Berlin
    David Downing writes the John Russell, Anglo-American journalist in pre-war Berlin
    Philip Kerr writes the Bernie Gunther, PI in pre and post-war Germany
    Jonathan Rabb writes the Nicolai Hoffner, police detective, pre-war Berlin
    Morley Torgov writes the Herman Preiss, police inspector 1868 Munich
    Wolf Haas writes the Simon Brenner, ex-cop, Vienna Austria
    Oliver Potzsch writes theJakob Kuisly, town hangman and his daughter Magdalena, 16th century Bavaria
Scandinavia
    Jussi Adler-Olsen writes the Inspector Carl Mork, cold case squad, Copenhagen, Denmark
    Karin Alvtegen writes the standalone crime novels, Sweden
    Blaedel, Sara writes the Louise Rick, Detective Inspector Copenhagen, Denmark
    K.O. Dahl writes the Frank Froelich, detective inspector Oslo, Norway
    Ake Edwardson writes the Erik Winter series, chief inspector, Gotesborg, Sweden
    Kjell Eriksson writes the Ann Lindell series, Police inspector, Libro, Sweden
    Karin Fossum writes the Konrad Sejer series, police inspector, Norway
    Anne Holt writes the Hanne Wilhelmsen series, police detective Oslo, Norway
    Anne Holt writes the Joanna Vik and Adam Stubo series, former FBI profiler and police chief, Oslo Norway
    Matti Joensuu writes the Timo Harjunpaa, detective sergeant, Helsinki, Finland
    Lene Kaaberbol writes the Nina Borg, nurse, Copenhagen Denmark
    Mons Kallentoft writes the Malin Fors, policewoman, Fjallbacka, Sweden
    Lars Kepler writes the Detective Inspector Joona Linna, Tumba, Sweden
    Camilla Lackberg writes the Patrik Hedstrom, detective, Fjallbacka, Sweden
    Asa Larsson writes the Rebecka Martinsson series, tax attorney, Sweden
    Stieg Larsson writes the hacker Lisbeth Salander and journalist Mikail Blomkvist, Stockholm, Sweden
    Henning Mankell writes the Kurt Wallander series, police detective, Sweden and others
    Liza Marklund writes the Annika Bengtzon, reporter, Sweden
    Jo Nesbo writes the police inspector Harry Hole, Oslo, Norway
    Hakan Nesser writes the Inspector Van Veeteren series, detective inspector, in a country much like Sweden
    Kristina Ohlsson writes the Alex Recht, Swedish National Police, Stockholm, Sweden
    Anders Roslund writes crime novels set in Stockholm, Sweden
    Yrsa Sigurdardottir writes the lawyer Thora Gudmundsdorrir, Reykjavik, Iceland
    James Thompson writes the Kari Vaara, police inspector Finland
    Maj Sjowall and Per Wahloo writes the Martin Beck, police detective, Sweden
    Helene Tursten writes the Inspector Irene Huss, Goteborg, Sweden
    Jan Costin Wagner writes the Detective Kimmo Joenta, Turku, Finland
Other European locations
    Michael Genelin writes the Jana Martinova, police commander, Bratislava, Slovenia
    Vilmos Kondor writes the mystery set in pre-war Budapest Hungary
    Anne Zouroudi writes the Hermes Diaktoros, enigmatic detective, Athens, Greece
    Jeffrey Siger writes the Andreas Kalidis, Chief Inspector, Greek National Police
    Janwillem VandeWetering writes the Grijpstra and de Gier, Amsterdam cops
Asian
    John Burdett writes theSonchai Jitpleecheep, police detective Bangkok, Thailand
    James Church writes the Inspector O series, North Korean police detective
    Colin Cotterill writes the Siri Paiboun, coroner in mid-seventies Laos
    Colin Cotterill writes the Jimm Juree, crime reporter rural Thailand
    Shamini Flint writes the Inspector Singh, Singapore
    Timothy Hallinan writes the Poke Rafferty series, expat American travel writer, Bangkok, Thailand
    Keigo Higashino writes the Detective Galileo, Tokyo, Japan
    Natsuo Kirino writes the various standalone crime novels
    Diane Wei Liang writes the PI Mei Wang, Beijing China
    Martin Limon writes the George Sueno & Ernie Bascom, Army CID investigators, 1970s South Korea
    Peter May writes the Li Yan and Margaret series, Chinese police detective and American forensic pathologist, Beijing, China
    Sujata Massey writes the Rei Shimura series, Japanese American antiques dealer
    Christopher G. Moore writes the American expat PI Vincent Calvino, Bangkok Thailand
    I. J. Parker writes the Akitada Sugawara series, civil servant turned sleuth, feudal Japan
    Eliot Pattison writes the Shahn Tao Yun series, disgraced Chinese policeman in Tibet
    David Rotenberg writes the Zhong Fan series, homicide detective, Shanghai, China
    Lisa See writes the Liu Holan series, police detective, Beijing, China
    Nuryi Vittachi writes the C.F. Wong, Feng Shui consultant, Singapore
    Michael Walters writes the Inspector Nergui series, Serious Crimes Unit, Mongolia China
    Qiu Xiaolong writes the Chen Cao series, Shanghai police inspector
Egypt, the Middle East, Turkey and India
    Esmahan Aykol writes the Kati Hirschel, mystery bookstore owner, Istanbul, Turkey
    Paul Doherty writes the Amerotke series, Chief Judge of 18th Dynasty Egypt
    Kishwar Desai writes the Simran Singh, social worker, Punjab India
    Nick Drake writes the Rahotep, detecive dynastic Egypt
    Zoe Ferraris writes theKatya Hijazi, medical examiner, Jidda Saudi Arabia
    Batya Gur writes the Michael Ohayon, police detective Israel
    Tarquin Hall writes the Indian PI Vish Puri
    Joseph Kanon writes the standalones, settings include Germany, Venice and Istanbul
    Barbara Nadel writes the inspector Cetik Ikmen, Istanbul, Turkey
    Michael Pearce writes the Gareth Owen series, Mamur Zapt in 1905 Cairo Egypt--WWI
    Elizabeth Peters writes the Amelia Peabody series, Edwardian archaeologist, Egypt
    Mary Reed writes the John the Eunuch series, Lord Chamberlain to Justinian 6th Cent 
Constantinople
    Matt Beynon Rees writes the Omar Yuseff, schoolteacher Bethlehem, West Bank
    Mehmet Murat Somer writes the drag queen sleuth, Istanbul, Turkey
    Paul Sussman writes the Yusuf Khalifa series, Inspector, Luxor, Egypt
    Jenny White writes the Kamil Pasha, magistrate in 19th century Istanbul, Turkey
Africa
    Suzanne Arruda writes the Jade del Cameron, photojournalist 1920's East Africa
    Nick Brownlee writes the Jake and Jouma, retired Scotland Yard detective and poiice detective, Mombasa, Kenya
    Nina Darnton writes the standalone set in Nigeria
    Adimchinma Ibe writes the Nigerian detective Peterside
    Jassy Mackenzie writes the PI Jade DeJong, Johannesburg, South Africa
    James McClure writes the Kramer and Zondi series, a white detective and his Bantu sergeant in apartheid South Africa
    Deon Meyer writes the several standalone crime novels set in South Africa
    Tamar Myers writes the missionary Amanda Brown, 1950's Belgian Congo
    Malla Nunn writes the 1950's South African cop Emmanual Cooper
    Kwei Quartey writes the Inspector Darko Dawson, Ghana
    Alexander McCall Smith is well known for his No. 1 Ladies Detective Agency series
    Roger Smith writes the standalone crime novels set in Capetown, South Africa
    Michael Stanley writes the David "Kubu" Bengu, assistakient superintendent, Botswana
    Robert Wilson writes the Robert Medway, fixer, East Africa
 
Russia
    Boris Akunin writes the Sister Pelagia series, Russian Orthodox nun, czarist Russia
    Boris Akunin writes the Erast Fandorin series, suave, young policeman in Tsarist Russia
    Sam Eastland writes the Inspector Pekkala, czarist-era cop in 1930's Stalinist Russia
    Brent Ghelfi writes the Alexei Volkovoy series, Russian undercover agent
    Andrey Kurkov - aspiring writer Viktor Zolotaryov and his penguin Misha, Kiev, Russia
    R. N. Morris writes the Porfiry Petrovich, Czarist-era policeman
    William Ryan writes the Alexeii Korolev, policeman in Stalin-era Moscow
    Martin Cruz Smith writes the Arkady Renko series, police detective, Moscow, Russia
Spain
    P.J. Brooke writes the Max Romero, inspector, Granada, Spain
    Arturo Perez-Reverte writes the Diego Alatriste series, swordsman, 17th century Spain
    Rebecca Pawel writes the Carlos Tejada series, cop in the Guardia Civilia, civil war-era Spain
    Alicia Gimenez-Bartlett writes the Petra Delicado series, police detective, Barcelona, Spain
    Robert Wilson writes the Javier Falcon series, policeman, Seville, Spain
    Manuel Vazquez Montalban writes the Pepe Carvalho, PI, Barcelona
South of U.S.
    Annamaria Alfieeri writes two historical mysteries set in Paraguay and Bolivia
    Lisa Brackmann writes standalones set in Mexico
    Hilary Davidson writes the travel writer Lily Moore, 2nd book set in Peru
    Joan Druett writes the Wiki Coffin series, Pacific Islander linguist, 1838 Exploring Expedition
    Luiz Alfredo Garcia-Roza writes the Inspector Espinosa series, police detective, Rio de Janiero, 
Brazil
    Leighton Gage writes the Mario Silva series, Chief Inspector, Federal Police, Brazil
    Guillermo Martinez  writes the Book of Murder,a standalone 
    Leonardo Padura writes the Mario Conde series, police lieutenant, Havana, Cuba
    Steven Torres writes the Luis Gonzalo, sheriff of Angustias, Puerto Rico,
Australia
    Peter Corris writes the Cliff Hardy series, Australian PI
    Garry Disher writes the Hal Challis series, Detective inspector, Melbourne Australia
    Garry Disher writes the bank robber Wyatt
    Kerry Greenwood writes the Phryne Fisher series, '20 sleuth, Australia
    Kerry Greenwood writes the Corinna Chapman series, bakery owner, Melbourne, Australia
    Adrian Hyland writes the Emily Tempest series, half-Aboriginal tribal police officer
    Peter Temple writes the Melbourne homicide cop Joe Cashin
Ireland
    Benjamin Black writes the Quirke series, pathologist, Dublin, Ireland in the '50s
    Ken Bruen writes the Jack Taylor series, ex-cop, Galway Ireland
    Tana French writes the Cassie Maddox series, police detective, Dublin Ireland plus other standalones
    Cora Harrison writes the Mara the judge, 16th century Ireland
    Declan Hughes writes the Edward Loy series, PI, Dublin Ireland
    Brian McGilloway writes the Benedict Devlin series, Garda Inspector, Ireland
    Adrian McKinty writes the Michael Forsythe series, Irish mercenary
    Stuart Neville writes the several interconnected books set in Northern Ireland
    Gerard O'Donovan writes the Mike Mulcahey, det. insp., Dublin Ireland
    Ian Sansom writes the Israel Armstrong series, bookmobile librarian
    Peter Tremayne writes the Sister Fidelma series, 7th Century Irish Nun, Ireland
 
 
 There you go!  Plenty of international writers of mystery to design your own world tour.  Were any missed?  Tell us about them in the comments.
 Enjoy!

 
