The Sources of Invention by John Jewkes et al.
1969. Second Edition. 372 pages. Pictorial dust jacket over red cloth. Black and white photographs throughout. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Tape mark on front free endpaper. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Unclipped jacket has moderate edge wear with tears, chipping and creasing. Some rubbing and marking to surfaces.