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  1. 1

    The mammoth book of IQ puzzles by Haselbauer, Nathan

    Published 2005
  2. 2

    Book of IQ tests : book 4 by Ken Russell

    Published 2004
  3. 3

    Book of IQ tests : book 3 by Russell, Ken

    Published 2004
  4. 4

    Book of IQ tests : book 2 by Russell, Ken

    Published 2004
  5. 5

    How to be a genius : Your brain and how to train it by Woodward, John

    Published 2009