Most big ones are available in English. Pick up a copy of any old Eike Middeldorf (author) book you find (the best one should be called "handbook of tactics"). I saw an ad in one of his later books that claimed an earlier book of his was translated in 3 languages, so there's almost certainly some English book of his around, and I'd spend 100+ bucks on it if I hadn't have it already. German copies are easily found, didn't ever find an English one in google. maybe library networks know more.
must have:
The Blitzkrieg Legend: The 1940 Campaign in the West by Karl-heinz Frieser and John T. Greenwood (Hardcover - Nov 10, 2005)
the classic "TF":
On the German Art of War: Truppenfhrung: German Army Manual for Unit Command in World War II by Bruce Condell and David T. Zabecki (Paperback - Dec 17, 2008)
this one might fit your interests:
Gefechtsfeld Mitteleuropa: by Franz Uhle-Wettler ~1980. Not sure if it was ever translated, though.
should have:
The German Infantry Handbook 1939-1945: by Alex Buchner (Hardcover - Apr 1, 1991) It's not meant to provide general lessons, but there are still plenty. A newer English edition may exist, for a newer German edition exists.
depending on taste:
Panzer Tactics: German Small-Unit Armor Tactics in World War II by Wolfgang Schneider (Paperback - Nov 30, 2005) About life and skills of German armour crews in WW2, very different from other armour-related books.
That's all German stuff from my 'favourite' stack of books that's available in English.
Maybe sometime some wealthy army will spend something on translating "Kriegsnah ausbilden", but don't hold your breath on this. Google will probably translate it earlier.
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