This is the most complete book of guitar scales and arpeggios ever written.
It's truly massive: more than 400 large pages packed with diagrams, analysis and explanations. Of course it includes all the basic, common scales you need to play rock, blues, jazz and so on, but also a vast number of exotic resources for you to experiment with and use to develop your own unique sounds. Many of these have never or hardly ever been used before.
A very thorough chapter on scale theory is also included.
Author's Website : http://cochranemusic.com