What's a good book that shows you every scale(and the positions) and techniques for guitar?
great guitar books are the Guitar Grimoire series
If you can find a copy i suggest The New Complete Guitarist. Has great beginner and advanced theory.
this man speaks the truth (about the guitar gimoire series i mean)
you can find all of this information on the internet for free
These 3 books have everything you need to know, awesome books Troy Stetina is an amazing teacher.
i've got The New Complete Guitarist and it has a crap load of stuff