Interested in marketing? Check out The Medical Science Liaison: An A to Z Guide by Erin Albert and Cathleen Sass which is a great read. It includes interviews with people in MSL and manager positions along with common career paths to and from this exciting role.
Speaking of Mitch Albom, "Tuesdays with Morrie" has been on my perpetual list of books to read. I know you said "no novels," but it seems like it would be a good read prior to Pharm School.