PC 22 Covers some important topics including- Draw Length, Committing to the shot, Nock Travel with Fall Away Arrow Rest, Arrow Spine, Mental Aspects to dealing with a bad day on the course. 

PC 21 covers some great topics including arrows, follow through, tiller tune, wrist strap and handheld release, Release execution, peep sights, muscle pain, and the shooting eye.

PC 20 answers several of your questions regarding- Strings, FOC, Vanes, Lighted Nocks, Shaft selection and my practice routine.