FirstHand (includes Vault Guides) has a guide to the consulting industry, a guide to the top consulting companies, information on the case interview, and profiles of several leading consulting firms. (Available for IESE MBA and MiM Students: First-time users must register)
Go to Discovery for books, articles and more. Search by using keywords like "consultants", "consulting firms". Combine with other keywords to narrow your search.
More info: Consulting Guide
