The Tower of Zanid
 The Tower of Zanid is a science fiction novel written by L. Sprague de Camp the sixth book of his Viagens Interplanetarias series and the fourth of its subseries of stories set on the fictional planet Krishna. Chronologically it is the seventh Krishna novel. It was first published in the magazine Science Fiction Stories for May 1958. It was first published in book form in hardcover by Avalon Books also in 1958 and in paperback by Airmont Books in 1963.