If you just want something quick, you can find a brief history and chronology of Boston College near the beginning of the most recent edition of the BC Fact Book.
If you have a little more time and need more detail, there are both published books and unpublished archives of BC history in the library collection.
If you need to go really in-depth for primary sources, you'll need the University Archives. On that page you can also find online access to yearbooks, student newspapers, course catalogues, photos, and digitized books.