You should have a PDF of the Help files, and if not, the Help files are available on-line, and there should be a way to print those out.
As for books, my first purchase would be Adobe Classroom in a Book Premiere Pro CS5, Adobe Press. It starts one off with a good tour of the GUI, and then steps the reader through doing almost anything that one would need in real-world usage. The author covers by the "how," and the "why." For some additional info, say on each Effect, the Help files come into play.
You can get to the manual through the Help menu in the program.