Summer reading often means grabbing a good book to keep you company on vacation. Or it could be a piece of required reading for the upcoming school year. Some books inspire. Some take you on a trip. Some can even change your life. Marketplace asked folks across different fields and professions to recommend books that helped them choose their careers or influenced the path they are now following. This week, we'll bring their suggestions. Perhaps they'll stimulate you in the same way they did our contributors.