NIGHT'S BLACK AGENTS by Fritz Leiber                                   Sphere Books, 1st British paperback edition, 1977              NIGHT MONSTERS & GREEN MILLENNIUM by Fritz Leiber     Ace Books, 1st printing & 2nd U.S. pb printing, 1969                  Condition: Near Very Good & Very Good-                                                                                                                                        AGENTS was Leiber's classic first collection (Arkham House, 1947), containing 10 stories, including the novella "Adept's Gambit", which was left out of the first U.S. pb ed.   Modest edge wear, light reading crease and back cover corner creasing.  Small price written on first page.  MONSTERS contains 4 more horror stories by Leiber, and MILLENNIUM, first published in 1953, is humorous science fiction.  Cover corner wear, one affecting a number of upper page corners, wear on one lower page corner and moisture staining on one cover back and slightly affecting some page edges.  Square spines and firm bindings.