This book features several of WW2s greatest or most well-known snipers. There is a good cross-section from most countries involved in the war, as well as male and also female snipers. The book itself goes into a lot of detail about their lives and war history, while also adding in some general information about sniping.
Didn't ever really get into the book, it didn't draw me in as much as I thought it was, but it is basically a collection of short biographies, not a story.
If you're interested in learning more about snipers, then this book is a good place to start.