Publisher; ACE Double, No. F-149Mass Market in good condition, with edgewear, scuffing and creasing on the covers. On the inside of the covers is a book store stamp, and the previous owner's name is written on the front free end paper. This is a well bound copy with an unmarked text. Pages: Cosmic Checkmate (96 pgs. ) King of the Fourth Planet ( 128 pgs. )
