Der Frosch mit der Maske

Both rhe book and the Film are on my shelf.

Book by Edgar Wallace

The Frog with the Mask is a 1959 West German-Danish black-and-white crime film directed by Harald Reinl and starring Siegfried Lowitz and Joachim Fuchsberger. It was the first of a very successful series of films based on works byEdgar Wallaceproduced by [https://en.m.wikipedia.org/wiki/Rialto_Film Rialto Film in West Germany. This film was adapted from the 1925 novel The Fellowship of the Frog