Using BYU's ScholarSearch, you can find many resources about specific careers found in the library as either books or E-books.
To begin your search, enter in the keyword "career" or "profession" AND then add whichever profession you are interested in. You can also use the filter for "Creation Date" to limit the search to more recent books.
This link will get you started on your search.
Additionally there are selected Library Guides with career information: