Ueberschär is an author and editor of numerous books on the history of National Socialism in Germany and the Second World War. He is one of the lead researchers on the seminal work Germany and the Second World War. Ueberschär edited the German-language volume containing 68 biographies of leading military men of Nazi Germany, Hitlers militärischer Elite [Hitler's Military Elite] published in 1998 and reissued in 2011.[2]
Ueberschär also covered the topic of the German resistance to Nazism in his 2004 work on Claus von Stauffenberg, Stauffenberg. Der 20 Juli 1944 and the 2006 work Für ein anderes Deutschland. Der deutsche Widerstand gegen den NS-Staat 1933–1945 [For Better Germany. German Resistance to Nazism 1933–1945]. He concluded that conspirators' plans for the post-Hitler society were incompatible with today's understanding of democracy; the plotters were hoping for a "genuine national community": "They propagated the constitutional plans were very far from an open democratic society".[3] He also edited the 2002 collected volume Der deutsche Widerstand gegen Hitler [German Resistance to Hitler].[4]
With Thomas Schnabel: Endlich Frieden! Das Kriegsende in Freiburg 1945. Schillinger, Freiburg i. Br. 1985, ISBN3-89155-009-X.
With Rolf-Dieter Müller: Deutschland am Abgrund. Verlag des Südkurier, Konstanz 1986, ISBN3-87799-073-8.
Freiburg im Luftkrieg. Mit einer Photodokumentation zur Zerstörung der Altstadt am 27. November 1944 von Hans Schadek. Ploetz, Freiburg i. Br. 1990, ISBN3-87640-332-4.