They included Bertolt Brecht, Kurt Tucholsky, Erich Kästner, Heinrich Mann and many others. Scientists such as Albert Einstein and Sigmund Freud were also included. In all, some 100 German and more than 40 foreign authors — such as Ernest Hemingway and Andre Gide — were considered un-German.

https://www.dw.com/en/when-books-were-burned-in-germany/a-43725960

Jack London.