Fantasy Masterworks Volume 10This is an omnibus edition of the Harold Shea tales, being The Incomplete Enchanter (1941), The Castle of Iron (1941), The Wall of Serpents (1953) and The Green Magician (1954). "The Mathematics of Magic: the greatest discovery of the ages... at least, that's what Professor Harold Shea thought. With the proper equations he could instantly transport himself and his friend Reed Chalmers to other times, to visit the wondrous lands of ancient legend. But Shea's magic did not always work -- at least, not quite as he expected."