The current issue of National Geographic Germany has a feature on the Romans in Germania, the Varus battle is mentioned several times. Some bits of it are available online (in German!), go
here.

That battle was actually already featured in an earlier issue (which I just ordered, hope it will contain interesting information!), again part of it is available online.

I have no idea if that story is also part of the US National Geographic magazine... It would be nice if it was!