Cover by Van Dongen for "Ribbon In The Sky" by Murray Leinster; Among Thieves by Poul Anderson; Needler by Randall Garrett; Drift by A. Bertram Chandler; Addendum On The Symbolic Psionic Machine (article); And Still It Moves (Article) by Eric Frank Russell; Evolution Without Mutations (Editorial) by John W Campbell Jr.; The Reference Library by P. Schuyler Miller. Interior art by EMSH, FREAS, and VAN DONGEN.