Title: Habits of A Happy Brain: Master Mind - Unlock the Unlimited Potential That You Possess Within You, Author: Lewis King
Title: Teste de inteligenta, probleme de logica, puzzle si amuzamente matematice: Volumul 2, Author: Nicolae Sfetcu
Title: Zadania dla przyszlych olimpijczyków, Author: Zbigniew Romanowicz
Title: Puzzles for Adults: 50 Brain Teasers with Step-by-Step Solutions: Boost Your Power of Problem Solving, Author: Atanu Chaudhuri
Title: Der 12-beinige Esel. 93 mathematische Rätsel mit ausführlichen Lösungen, Author: Heinrich Hemme
Title: Words for the Wise, Author: Richard DeSteno
Title: Gamestorming The Way Forward, Author: Priya Sarin
Title: Brain Boost: Supercharge Your Memory and Cognitive Abilities, Author: Maxwell Scott
Title: Exercise Your Brain To Get Sharper! Brain Exercises and Other Methods for Improving Intelligence, Dedication, and Inspiration, Author: Adam Dennis