A page from a Nazi’s WWII scrapbook documenting his participation in the war and illustrating a gruesome enthusiasm for cruelty he inflicted in Poland.

A page from a Nazi’s WWII scrapbook documenting his participation in the war and illustrating a gruesome enthusiasm for cruelty he inflicted in Poland.

A page from a Nazi’s WWII scrapbook documenting his participation in the war and illustrating a gruesome enthusiasm for cruelty he inflicted in Poland. Note the hand-drawn tick representing Jewish people.

A page from a Nazi’s WWII scrapbook documenting his participation in the war and illustrating a gruesome enthusiasm for cruelty he inflicted in Poland.

The cover page from a Nazi’s WWII scrapbook documenting his participation in the war and illustrating a gruesome enthusiasm for cruelty he inflicted in Poland. The title, "Krieg," is German for war.

A Nazi flag appended to the cover of the scrapbook documenting a Nazi soldier's participation in the war and illustrating a gruesome enthusiasm for cruelty he inflicted in Poland.