TOWER OF GLASS by Robert Silverberg                                    Bantam Books, First paperback printing, 1971                            Condition: Very Good+                                                                                                                                                                        One of the finest and most productiive living (at this writing) science fiction writers, Robert Silverberg's career spans nearly 70 years and he has been nominated for awards dozens of times.  This novel received nominations for both the Hugo and  the Nebula, combining high adventure and social consciousness.  A scratch across the spine and modest edge/corner wear, else solid, square spine, firm binding and no markings or writing.   (Ad for SF Book Club bound into middle of book.)