Just finished reading Nicolas Freeling's The King of the Rainy Country, which features Inspector Piet Van Der Valk. He works out of Amsterdam, but cases occasionally take him various places in Western Europe. In 1975, a millionaire and an 18-year old naked girl disappear. He is sent to find them, a journey that takes him to France, Germany, Switzerland, Spain and ever-deepening mysteries. I spend most of my time in the medieval era, but Freeling -- there are at least 35 mysteries in English, in series featuring not only Van Der Valk, but also Henri Castang, Arlette Van Der Valk, and others -- is one of the few writers that tempt me into the 20th century.