Where there is light, there is also shadow. Hamburg likes to present itself as an open-minded cultural and trading metropolis. Numerous books, museums, and monuments testify to the glorious history of the Hanseatic city. However, the ugly side of the city's history often remains hidden. Although its locations are actually ubiquitous, they become apparent when one knows the past of these places: a representative building or a ship dock, a pretty meadow or an inconspicuous intersection, a renovated facade, a sealed area, a store entrance, a driveway, a booth in the basement, or a tree in the backyard of a residential building. "The Black Hamburg Book" leads to places that ordinary city guides tend to avoid. These are places of horror, violence, and fear, but also of tragic comedy. Everyday locations in Altona, Barmbek, Eppendorf, Harburg, St. Pauli, and Win.