A History of the 664, 665, and 666 Air Observation Post Squadrons of the Royal Canadian Air Force. Story of AOP squadrons of RCAF, operating in Europe during latter stages of WWII. Few have seldom heard about these units. Knight's passionate interest for their cause led him to provide a new chapter in Canadian aviation history by writing this very thorough and well-researched volume in honor of his father's services during the war. Their contribution to the final Allied victory in Europe must not be forgotten. 90 photos, 5 documents, 3 maps.