"Stalking Wolf" is one of several sold-out print editions. The original pen-and-ink drawing, made in 1973 when I was a graduate student at Purdue, depicts one of Erich Klinghammer's first wolves at his North American Wolf Park in Battle Ground, Indiana. Erich had invited me to his facility to obtain photographic reference materials for my drawings. The wolf, named "Koko" was, in fact, stalking me.
The edition of 100 photolithographs was issued in 1973, and it sold out in 1983.