Check out "Collecting Modern" by David Rago and John Sollo. Unfortinuatly the book is out of print I believe. I found my copy on an online auction site. The book is pretty informative about evans and many other local artist including Nakishima and Esherick. One side note the co-author David Rago you might know from Antiques Roadshow. He is a appraiser whom ocasionly makes an appearance. Hope this may help