WW2 Era Booklet Strategy and Tactics of the Modern German Army

Printed by Bernards publishers Ltd The Grampians, London W.6 as part of a series of 31 issues 3 of which detailed war related themes this one being numbered 25, it comes as a small booklet detailing the German army and air force tactics and organisation. The only ones I can find online are hugely priced so I am assuming this to be a rarity, it comes in very good condition for its age with signs of age and use.