Friedrich Glauser’s Thumbprint is a curiosity! I was well into the book before I realised it was written in 1936. It’s a detective story, set in Switzerland, and written in a rather dated way. I got rather lost with the foreign names and the general oddnesss, but otherwise it’s a very easy 200 page read. The Austrian author lived a short and rather tragic life, spending much of his life in asylums and prison.