Good book, really good book, 21st Century Submarines is a book about the undersea vessels of the World's navies. Including Russia, the US, UK, Germany, France and other countries around the world. The book mainly describes each country's subs, from the Typhoon Class SSBNs, to the Ohio Class boomers. The book is a must read if you want to find out about subs. Well, the book doesn't really have plans of the different subs (which I wanted). But it's still a pretty amazing book for 24 bux (CAN).