I am not sure whether the following would be an acceptable soft-question, needs rewording, or should go to another site.
Most mathematics and computer science textbooks I read have exercises for the reader. Some make answers (e.g. to odd questions) readily available to the reader, however, many others classify solutions as "instructor resources" and do not make these available to the reader. For example, I'm reading Probabilistic and Graphical Models, but I do not know where to find the answers to the chapter exercises.
I am studying a textbook outside of a course (that is, without an instructor), and was wondering if there exists a "legit" method of obtaining textbook solutions. I might guess that the "instructor resources" designation is to prevent students from cheating, so there is no solution to this problem. Still, if someone know of how to do this, it would help their readers that are studying without instruction.