“the ultimate guide to the topic...looks like the ultimate compendium of accurate, thoroughly checked and cross-referenced material on the subject”—Stone & Stone Second World War Books; “recommended”—ARBA; “The authors have done a painstakingly thorough job of compiling and assessing the results of thousands of Allied submarine attacks during World War II. This is, without question, the finest available resource for those who want to know and understand the results of those long-ago life-and-death battles.”—Paul Stillwell, coauthor of Sharks of Steel and editor of Submarine Stories: Recollections from the Diesel Boats.