A Series of Lessons in Raja Yoga: Now Available!
This fine work on Raja (or royal) yoga was created by Yogi Ramacharaka- a pseudonym (it is generally held) for William Atkinson. it's quite good, and much more hands-on and instructional than many works, which tend towards mere philosophy. The ultimate goal is increased awareness, especially of the self but also in general, and exercises in mental focus and attention. Atkinson wrote two other full length works on Yoga; specifically Gnani (or Jnani) and Hatha yoga. I am editing them as well.