Petra Johann

Petra Johann (born 1971) holds a PhD in mathematics. Before becoming a writer, she worked for several years in research and in the software industry. She grew up in Germany’s Ruhr region. Her suspense novels include *Die Frau vom Strand*, *Der Buchhändler*, *Die Schwester*, *Der Steg*, and *Wem du traust*. Her background in mathematics, research, and software development represents an unusual professional path into crime fiction.