After finishing high school, he attended the Kansas City Art Institute, where Thomas Hart Benton was among the teachers.
[4] His first job was at the art agency of Stevens/Hall/Biondi, from where he emerged as professional commercial artist and a paperback cover painter.
[4] When Harold W. McCauley retired from Nightstand Books, William Hamling hired Bonfils to replace McCauley and assigned him with setting up a new publishing operation out of San Diego, which was to become Greenleaf Classics, with Bonfils as its art director and Earl Kemp as the editor-in-chief.
[2] During the heyday of sex publishing, Bonfils was producing some fifty covers every month.
[2] He retired from the book cover illustration business in the mid-1970s and continued to paint within the gallery community of San Diego.