Hints for
finding books about particular the history or philosophy, etc. in the MERLIN online catalog or in Worldcat:
Once you have chosen a career to investigate, check the Databases by Subject listing for databases specific to your chosen field.
This multi-disciplinary database provides full text for more than an abundance of journals and covers extensive academic disciplines and provides comprehensive content, including PDF back-files, videos, and searchable cited references.
Google Books is great for needle-in-a-haystack searches for books that include information on a very narrow topic. Look for the Find In a Library Link. The Advanced Google Books Search is often best.