This is a fascinating nonfiction book titled "Flying Windmills" by Frank Ross Jr. Published in 1953 by Lothrop, Lee & Shepard Co. Inc, it offers a detailed history of the helicopter. The book is intended for adults and features charts and photographs to enhance the reader's understanding of the topic. The author's informative writing style makes it an excellent resource for those interested in the technical aspects of flying and helicopters. This hardcover book is a must-read for military and history enthusiasts, and it's a great addition to any collection of books on the topic of aviation.