In the Ruby Redfort books, underneath the usual blocky graphic dust covers there is a range of flies, symbolising Spectrum. A list of the colours as follows:
  1. Look Into My Eyes: a lime green fly with a large amount of detail.
  2. Take Your Last Breath: a deep blue fly also with a large amount of detail.
  3. Catch Your Death: a big red fly
  4. Feel The Fear: A large, embossed, transparent detail of a fly with many bumps all over it, reminiscent of Braille dots.
  5. Pick Your Poison: a black fly with a skull for a head and a snake tongue. Limited detail.
  6. Blink And You Die: a small dead fly