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Mensa's Most Difficult Logic Problems
Mensa's Most Difficult Logic Problems provides an exceptional analytical challenge for even the most adept of puzzlers.Sound reasoning and logical thinking are foundations of all …
IFLScience! The Official Science Puzzle Book
IFLScience and puzzles unite in the IFLScience! The Official Science Puzzle Book – a perfect combination for anyone who wants to be amazed by the furthest reaches of scientific …
Mensa's Most Difficult Maths Tests
With puzzles ranging from killer Sudoku to numerical crosswords, this colourful puzzle book will keep you entertained for hours.
Natural History Puzzle Book
Guides you through the history of our incredible world with hundreds of questions certain to confound and amuse children and parents alike.