Hours of great reading await, with tales from some of the 20th century's most renowned science fiction authors, Here are 25 science fiction stories (plus a bonus short-short):UNKNOWN THINGS, by Reginald BretnorCAPTIVES OF THE FLAME, by Samuel R. DelanyEXPEDITER, by Mack ReynoldsONE-SHOT, by James BlishSHIPWRECK IN THE SKY, by Eando BinderZEN, by Jerome BixbyLANCELOT BIGGS COOKS A PIRATE, by Nelson BondSENTIMENT, INC., by Poul AndersonTHE ISSAHAR ARTIFACTS, by J. F. BoneTHE NEXT LOGICAL STEP, by Ben BovaYEAR OF THE BIG THAW, by Marion Zimmer BradleyEARTHMEN BEARING GIFTS, by Fredric BrownHAPPY ENDING, by Fredric Brown and Mack ReynoldsLIGHTER THAN YOU THINK, by Nelson BondRIYA'S FOUNDLING, by Algis BudrysACCIDENTAL DEATH, by Peter BailyAND ALL THE EARTH A GRAVE, by C. C. MacAppDEAD RINGER, by Lester del ReyTHE CRYSTAL CRYPT, by Philip K. DickTHE JUPITER WEAPON, by Charles L. FontenayTHE MAN WHO HATED MARS, by Randall GarrettNAVY DAY, by Harry HarrisonTHE JUDAS VALLEY, by Robert Silverberg & Randall GarrettNATIVE SON, by T. D. HammJUBILEE, by Richard A. LupoffFINAL CALL, by John Gregory Betancourt