This book is a very good book, but not a classic or exceptional book. It basically, tells you about specific u-boats. Intresting Pictures.I would recommend you to buy this after you buy Hitler's U-Boat War by Clay Blair (5/5)(theres two volumes). You read them first to give a good overall (very detailed) (even if you can't spell u-boat) knowledge. This book will add to that knowledge with specific knowledge of specific u-boats. Basically, you want to be an expert to u-boats. Buy these books (mention earlier). You will be on your way. You will blow peoples MINDS.Its a must for the (WW II) history buff's library. Get all three. You won't be sorry!