The novel "A Case of Conscience" by James Blish was published for the first time in 1958. The first part was published as a novella in the magazine "If" in 1953. The novel won the Hugo Award for best novel of the year. In 2004, the original novella won the Retro Hugo Award given to works published 50 years earlier. Cover art by Karel Thole for an Italian edition. Click to read a review of this novel!