Plein Air after "Alla Prima"

I had the opportunity to paint with Dan Gerhartz one night, and was totally inspired by a process that I was unfamiliar with. My former student advised me, "if you are going to paint with Dan, then read "Alla Prima" by Richard Schmid, Dan's mentor. " It was a struggle finding a copy of this out of print book, but my friendly local library retrieved one from Minnesota. 
This painting is the first after reading the book.  I hope  to apply his rules for plein air painting, and that my work will continue to get looser and more painterly, that is the goal.