Read anything by Mouni Sadhu as a good start, avoid anything 'western' like 'meditating to music' etc and all that 'guided meditation' nonsense. The branch of Yoga dealing with the mind is Raja Yoga and I can recommended http://www.yogebooks.com/english/atkinson/1906-09rajayoga.pd... it might take you several lifetimes to get through it all, but it's worth it!