David Doyle has authored almost 100 books for Squadron-Signal Publications, in several series, ranging from 504-page tomes down to 48-page volumes. These works are divided into several series.
The finest of these are the Historical Reference series books. This short-lived series featured detailed, authoritative histories on various subjects, assembled using primary source material. All the books in this series were written by David.
The In Action series consists of 48 to 88 pages of vintage color and black and white photographs and a concise text concerning the development and deployment of specific military equipment.
Walk Around books consists of 72 to 88 pages of primarily color photographs and a concise text describing some of the finest preserved examples of military equipment existent. On Deck books are the same type of book, but deal with naval subjects.
Also dealing with nautical subjects is the Squadron At Sea series, which are 104 to 160-page books that chronicles the life of various warships from keel-laying to final disposition, be that preservation, scrapping or loss in combat. All the books in this series were written by David.
Detail in Action books combine elements of both In Action and Walk Around books. These 80 to 88 page books containing both color and black and white photos, some taken during wartime and others of preserved equipment, and a concise text describing the development, deployment and operation of the vehicles.