THE MAKER OF UNIVERSES - 1965 -  Very Good-             THE GATES OF CREATION - 1966 -  Very Good-                     A PRIVATE COSMOS - 1968 - Very Good+ to Near Fine             BEHIND THE WALLS OF TERRA - 1970 - About Very Good       THE LAVALITE WORLD - 1977 - Very Good-                               by Philip Jose Farmer - Ace Books, First Editions                                                                                                                             Farmer's amazing World of Tiers series, about a different space-time universe created by Urizen (the Maker of Universes),  features the adventures of the heroic rogue Kickaha.  Though two additional  books were added before Farmer's death, these are the five original volumes of the series.   MAKER has spine lean, some fairly modest spine edge/cover corner wear, very light cover creasing and a bookstore stamp inside.   GATES has spine lean, some wear on and near spine and at corners, a front cover flake and a bit of very light creasing.  COSMOS has just light general exterior wear.  All three books have darkening on the cover backs.  TERRA has modest cover edge wear, two small corner creases and a crease across spine, else a sharp copy with white pages.  WORLD has small creasing and black staining at lower front corner of cover and first few pages; there is moisture staining on front cover (mostly visible on back) which is also somewhat visible on front pages along with some curl of pages; also some moisture staining on back cover.  All books are firmly bound with no writing.