Is there a practice Drivers Permit Test and/or a book to study by ?

I'm 15 and in a couple months I will be able to take the permit test. I live in virginia. Is there a book to study by on the internet ? Is there a practice test that I don't have to by ? I have a droid so I would like to have the book to where I can download it on my phone. Please help. Thank you .|||Go to the Secretary of State office and ask for a copy of drivers lesson booklet. Then ask them these questions. Good luck and dont run anyone over!