First read all of the books in the early 80's now revisiting them while contracting in Iraq.Helps pass the limited down-time.
As a kid, I used to love reading the Sven Hassle books! Having grown up with 2 grandfathers who had served in the Wehrmacht near the end of WW2 (and having heard their personal war stories) I found his books to be the most realistic depictions of front line life for a German soldier. Never mind the fact they are joyously entertaining! :)
Although the later books become parodies ,the early ones are very good.I read them as a teenager in the 1970s.It`s a pity a decent film has never been adapted from the novels,The Misfit Brigade as Hassel said is not good at all.