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Hjärngympa som ger lugn och fokusUtmana dig själv, familjen och dina vänner med dessa 190 kluriga mattegåtor. Kreativ tankeverksamhet som sänker stressnivån och skärper din …

Nathan Haselbauer, President of the International High IQ Society, has painstakingly researched and designed this impressively varied collection of over 500 mind-bending puzzles to …

With this brain-teasing new collection of tantalizing puzzles and top-grade problems, Nathan Haselbauer, mastermind behind the test for the world's most intelligent person, throws …

A brilliant, new collection of quick brain teasers offering satisfaction in moments! This giant volume offers hundreds of original new puzzles ranging from easy maths and logic …

Here is the biggest and most varied book of Sudoku puzzles ever compiled. Over 400 painstakingly prepared puzzles designed to satisfy all levels from beginner to expert. "The …