MINDSWAP - Dell Books, 1st paperback printing, 1967 - VG+    DIMENSION OF MIRACLES - Dell Books, 1st prtg, 1968-VG+  OPTIONS - Pyramid Books, 1st printing, 1975 - VG+ to NF        by Robert Sheckley                                                                                                                                                                  These three novels are among Sheckley's best - and his funniest.  DIMENSION may well have helped inspire Adams' HITCHHIKER'S GUIDE TO THE GALAXY.  MINDSWAP and DIMENSION each has a light reading crease and some other light to modest wear.   OPTIONS has light wear on the extremities.  All 3 have light page toning, but also straight spines, firm bindings and no markings or page wear.