"The World's Work: A History of Our Time Vols. 38-40, 42-43 (1919-1922) Ex-lib" is a set of four hardcover volumes published by Doubleday in 1919. Written by the World's Work Editorial Staff, these books cover various topics related to history, making them a valuable and collectible set for those interested in the history of our time. With a focus on historical events and developments, this set offers a comprehensive look at the world during the early 20th century, making it a must-have for history buffs and collectors alike.