<< How about The Art Spirit by Robert Henri. >>
This is a great book and worthy of all art teachers, elementry to high school.
He was an Ash Can artist who taught and was quoted and represented in this
book that will give you qoutes and resources for the rest of your days.
Robert Henri was great at giving people the knowledge of art theory and
creation but also the spirit and drive of the artist that keeps us going.
Very good reading and quotes abound.
San Jose, CA