From the dustjacket:
Grand Master of Adventure: The Drawings of J. Allen St. John collects for the first time the exquisite pen, ink, and pencil illustrations of the grand Tarzan and heroic fantasy artist. With the benefit of this collection, new generations can assess St. John's impact on later masters of fantastic illustration including Roy Krenkel, Al Williamson, Hal Foster, and Frank Frazetta, while absorbing what an important groundbreaking pioneer St. John was for the embryonic heroic fantasy and sword and sorcery genres.