To ask a question you could always start a new topic in an appropriate forum area such as Music and Guitar Learning, or BGU.
Generally, you get the "book" when you buy a course. If you opt for digital download only, you would need to download the pdf of "the book" and save it on your computer or print out a paper copy. If you get the full version, you should get a nice package of printed material, DVDs and CDs.
Either way, once you have bought a course, you can go to the BGU site and access the digital download (manual, videos, backing tracks) from any computer anywhere.