I wrote a math book and published it with a publishing company in Germany. It went out of print after 12 years. The company still holds the rights and does not allow anybody to print or publish it. I talked to them, but they don't see any possibility to make available to the public anymore.
I do not have financial interest in the book - I just want it to be available to gifted students whom it was written for. Do I have any chance to make it available, against the will of the publishing company?