If you haven't already had your brain rearranged this year by Dave Tompkins's How To Wreck A Nice Beach, an occult history of the vocoder from Cybertron back to the communication R&D labs of Second World War... well, you should. But if you want to try out your code-breaking skills before you buy (by the way, it's one of the most beautifully produced books I've seen in a long time) you can visit Dave's blog. Essential musings on Rammellzee's death, vocoder ephemera, an astonishing and essential mix taking in Jonzun Crew, ELO and The Human League, and many other enigmatic variations on the vocoder theme. All done by the dude above in the Luke Skyywalker jacket. Essential reading and listening... as is this completely singular book.