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markgilchrist
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The GCHQ Puzzle Book
GCHQ
The Big Book of Christmas Mysteries: The Most Complete Collection of Yuletide Whodunits Ever Assembled
Otto Penzler
How to Puzzle Cache
Cully Long
Recently added
How to Puzzle Cache
12:00 am 22 August 2015
I think this will live permanently on my "currently-reading" shelf!
A great insight into puzzle caches and, along with some of the recommend websites it should help remove some of those blue question marks from the map!
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