Break it down "Barney" style

What would be the starting point (video/book wise) for someone interested in pursuing Parelli methods with their horse? He has so many out there, it's hard to know where "square 1" is.

The thing I suggest people do is go on Ebay and buy the Level 1 pack. Parelli doesn't make it anymore b/c they replaced it with the Success Series.....personally I'm not a fan of the change. The Success Series is wonderful, however I think the Level 1 pack gives students a more in-depth look at theory and technique. Once the person is familiar with the 7 games, that's when I think the Success Series comes into play.