""A Sunny Subaltern: Billy's Letters From Flanders"" is a book written by William Gray, originally published in 1916. The book is a collection of letters written by Billy, a young British subaltern, during his time serving in Flanders during World War I. The letters provide a personal account of his experiences and observations of the war, including his interactions with fellow soldiers, the conditions on the front lines, and the impact of the war...