Harold Montgomery Belgion was born in Paris in 1892. His father John was private secretary to the Paris Managing Director of an American Life Insurance Company. Belgion was privately educated in France, although he rejected French nationality and remained a British subject throughout his life.
Belgion entered journalism at an early age and by 1915-1916 was in Paris as editor-in-charge of the European edition of the "New York Herald". In 1916 he returned to England to volunteer for military service and became a private soldier in the Honourable Artillery Company. In July 1918 he was commissioned as a second lieutenant in the Dorsetshire Regiment. Belgion's experiences in World War I are described in an anthology "Promise of Greatness" (Cassell, 1968).
Between the wars he worked at a number of newspapers in England and New York. In 1929 Faber and Faber published his first book "Our present philosophy of life" (which later appeared in French as "Notre foi contemporaine"). Subsequent books included "The Human Parrot" (Oxford University Press, 1931) and "News from the French" plus a large number of articles, essays and book reviews.
In 1939 he joined the Royal Engineers and was trained to undertake rail transport duties, and was eventually captured by the Germans. While he was a prisoner-of-war in Germany he gave his comrades in misfortune a series of lectures on English literature which resulted ultimately in his most successful book "Reading for profit" (1945), the English edition of which sold over 100,000. In 1943, while still a prisoner, he was awarded a Diploma in English Literature by Oxford University and in 1944 was exchanged on medical grounds, thanks largely to the Red Cross, and returned home via Sweden.
In 1945, Belgion married Gladys Helen Mattock, who had founded Westwood House School near Peterborough and became its headmistress.
After the Second World War, Belgion's output of book, articles and reviews remained high. His chief activity in the immediate post-war years concerned the trial of war criminals or ex-enemy service men and diplomats, which outraged his sense of justice. In the post-war years, he also did a lot of lecturing, notably for the British Council at French Universities, for the British Army and for the University Societies in Cambridge and London.
Most of his literary works are greatly influenced by his religion: he was a devoted and ardent Christian of the Anglican persuasion. His religion brought him into friendship with famous poets and writers including T S Eliot, C S Lewis, Alec Vidler. His military friends included Major-General J F C Fuller and Captain Sir Basil Liddell Hart.