Arthur Conan Doyle 
History of the Great War (All 6 Volumes) 
First-hand Accounts of World War 1: Interviews With Army Generals, Private Letters & Diaries, Eyewitness Testimonies, Including Detailed Description of the Main Battles of the British Army

This book is a complete six-volume history of the First World War, written during the war by Sir Arthur Conan Doyle. Doyle interviewed army generals, read their papers and diaries, and he also talked to numerous soldiers in order to get a full picture. He describes all the main battles of the British Army, offering very detailed accounts of battles, where great feats of bravery and courage are given.
Arthur Conan Doyle (1859-1930) was a British writer best known for his detective fiction featuring the character Sherlock Holmes. The Sherlock Holmes stories are generally considered milestones in the field of crime fiction. Doyle is also known for writing the fictional adventures of Professor Challenger and for propagating the mystery of the Mary Celeste. He was a prolific writer whose other works include fantasy and science fiction stories, plays, romances, poetry, non-fiction and historical novels.