Not usually a fan of multiple rule books to cover the 'same' period - always seems a suspect attempt to pry money for little return - but the prices here don't suggest that is the tactic, quite reasonable in fact. Now, had they been $40 a pop, I wouldn't have even bothered posting.
(Got this way about rules when selling off a late friend's collection - he had well over $1,000 worth of WWII rules from a very well known game system. That races past crazed insanity into some unknown realm of pathetic greed. Addendum to fix omissions or errors? Sure. 36 rulebooks for one war? F**k no.)
Back on topic, based on price, I am struck by the enjoyable artwork. Heck, I might even have to 'bite' myself and pick these up. Was the ententre intended?!