Career-focused books are harder to come by since much of the information is in the form of interviews and blogs on sites like Gamasutra. However, those books that exist have the benefit of being thorough and detailed. The below book may be of interest:
In addition to the links listed below, don't forget to ask your professors about other resources that your department might offer like accounts for Digital Tutors or Lynda.com.
You can use some Woodbury Library databases to research companies like studios and publishers. These databases often have information about the people working at a company, the company's financial information, a listing of their competitors, links to recent news articles about the company, and more. Below are a few databases to try.