1968. Science Fiction Book Club Ed.. 158 pages. Black and white dust jacket over blue cloth. Pages remain bright and clear with minimal tanning and foxing. Some creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Light crushing to spine ends. Minor tanning to spine and edges. Unclipped jacket has moderate edgewear with chips, tears and creasing. Light tanning to spine. Some rubbing to surfaces.