This is a reprint of a genuine handbook for the Home Guard in 1941, if you are interested in the British Home Guard during World War Two then obviously this is something for you.
A lot of the information here is hard to find elsewhere, or it will be spread out over several books or websites. This book is very convenient in that it contains in a small package everything a member of the Home Guard was supposed to know, and it's well arranged too.
The things that a Home Guard member was supposed to know included things like: traffic control, destroying railways, using and maintaining his weapons, making improvised grenades, and lots of other things.
Much of this would apply to the regular army as well, and since there's no reprint of regular army manuals this is a serviceable substitute.
Definitely a worthwhile purchase for amateur historians, wargamers, budding writers etc.