Phil Bradley's New Book: Expert Internet Searching
Most librarians will appreciate the subject line of the email I received: Is it all on Google? No! This is something many web users tend to forget. Drilling down into the right tools, what we used to call "the deep Web", can deliver far more quality materials than a cursory Google search.
Bradley has rewritten much of the book from scratch, and given that I've lost my copy of the previous edition, this might be the time to grab a new one.