Yep, totally reasonable and a good thing to do. Even if you haven't signed all the confidentiality stuff yet most employers can send you relevant articles, boo

Yep, totally reasonable and a good thing to do. Even if you haven't signed all the confidentiality stuff yet most employers can send you relevant articles, books or point you towards some reading and research that might help. I'd even specifically ask, especially if you are unfamiliar or new to the specific industry vertical, what might be some good resources you can read about to learn more specifics on the industry and client problems they are solving. This way you have some understanding of the business itself which is powerful information to have as your questions will be better aligned when you are there.