Complex sentence: He is the author (amongst other books) of "The Desert Generals" a book that attacked the perceived cult of British Field Marshal Bernard Montgomery, by giving the viewpoints of his sacked predecessors in the North Africa campaign.
Split into simpler sentences: He is the author of "The Desert Generals", a book that attacked the perceived cult of British Field Marshal Bernard Montgomery. It gave the viewpoints of his sacked predecessors as commanders in the North Africa campaign.