Question: From where had Arthur Neville Chamberlain returned when the Europe and the Czechs special was published?

Context paragraphs:
Rise of Neville Chamberlain: The early life, business career and political rise of Neville Chamberlain culminated on 28 May 1937, when he was summoned to Buckingham Palace to "kiss hands" and accept the office of Prime Minister of the United Kingdom.  Chamberlain had long been regarded as Prime Minister Stanley Baldwin's political heir, and when Baldwin announced his retirement, Chamberlain was seen as the only possible successor.

Mark Chamberlain: Mark Valentine Chamberlain (born 19 November 1961) is an English former international footballer.  He is the younger brother of Neville Chamberlain, and the father of Liverpool and England international player Alex Oxlade-Chamberlain and Portsmouth's Christian Oxlade-Chamberlain.

Heston Aerodrome: Heston Aerodrome was a 1930s airfield located to the west of London, UK, operational between 1929 and 1947.  It was situated on the border of the Heston and Cranford areas of Hounslow, Middlesex.  In September 1938, the British Prime Minister, Neville Chamberlain, flew from Heston to Germany three times in two weeks for talks with Adolf Hitler, and returned to Heston from the Munich Conference with the paper referred to in his later "Peace for our time" speech from 10 Downing Street.

Anne Chamberlain: Anne de Vere Chamberlain (née Cole; 1883 – 12 February 1967) was the wife of British Prime Minister Neville Chamberlain.

Birmingham Edgbaston by-election, 1940: The Birmingham Edgbaston by-election, 1940 was a parliamentary by-election held for the British House of Commons constituency of Birmingham Edgbaston on 18 December 1940.  The seat had become vacant when Neville Chamberlain, the constituency's Conservative Party Member of Parliament had died from stomach cancer on 9 November.  Chamberlain had been Prime Minister until May 1940, and had held the Edgbaston seat since the 1929 general election.

Austen Chamberlain: Sir Joseph Austen Chamberlain, KG (16 October 1863 – 17 March 1937) was a British statesman, son of Joseph Chamberlain and half-brother of Neville Chamberlain.

Neville Chamberlain: Arthur Neville Chamberlain, ( ; 18 March 1869 – 9 November 1940) was a British Conservative politician who served as Prime Minister of the United Kingdom from May 1937 to May 1940.  Chamberlain is best known for his appeasement foreign policy, and in particular for his signing of the Munich Agreement in 1938, conceding the German-speaking Sudetenland region of Czechoslovakia to Germany.  However, when Adolf Hitler later invaded Poland, the UK declared war on Germany on 3 September 1939, and Chamberlain led Britain through the first eight months of World War II.

Europe and the Czechs: Europe and the Czechs was an influential and widely read best-selling Penguin Special written by journalist Shiela Grant Duff in 1938 during the appeasement of World War II .  Her prominence as a journalist was established with this publication.  It was published on the day British prime minister Neville Chamberlain returned from Munich in which he pressured Czechoslovakia to cede territory to Nazi Germany, and it was distributed to every member of parliament.  In her book she defended the Czech nation and criticized British policy, claiming that war could be an option if it were necessary to confront Hitler's aggression in Czechoslovakia.  She argued against the policy of "peace at almost any price".

Runciman Report (on Czechoslovakia): The Runciman Report was issued at the conclusion of Lord Runciman's Mission to Czechoslovakia in September 1938.  The purpose of the Mission was to mediate in a dispute between the Government of Czechoslovakia and the Sudeten German Party (SdP), representing German separatists within Czechoslovakia (in the so-called "Sudetenland"), which was threatening to plunge Europe into war.  The report, published in the form of letters addressed to the British Prime Minister, Neville Chamberlain and the Czechoslovak President, Edvard Beneš, on 21 September 1938, recommended the cession of the territory concerned to Nazi Germany, thus paving the way for the Munich Agreement of 30 September 1938.

Chamberlain war ministry: Neville Chamberlain formed the Chamberlain war ministry in the United Kingdom in 1939 after declaring war on Germany.  Chamberlain led the country for the first eight months of the Second World War, until the Norway Debate in Parliament led Chamberlain to resign and Winston Churchill to form his ministry.

Supporting paragraphs: Europe and the Czechs Neville Chamberlain
Answer: Munich