I am co-authoring a book and I bumped in a reference with a curious angle to it. I would like to check it. If you know who have a PDF of "The Jewish Problem" by Bruno Bauer I would appreciate your help. Greetings from Finland
The best way is often to look for a worldcat entry.
This shows you all the libraries in your area that have the book. Per interlibrary loan, you should easily be able to get it to a place close to you.