Horst Steffen

The provided articles do not mention Horst Steffen. Instead, they focus on Nils-Ole Book, who is being considered as the new sports director for Borussia Dortmund (BVB). Book, who has a connection to BVB since childhood, is currently associated with SV Elversberg. The articles highlight the surprising announcement of Sebastian Kehl's departure as BVB's sports director, which occurred shortly after a victory against HSV. Book is described as a potential candidate to replace Kehl, with some sources labeling him as Dortmund's "Wunschkandidat" (desired candidate). The articles also reference a historical DFB-Pokal match between SV Elversberg and Borussia Dortmund in 1981.