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MENTAL GYMNASTICS: 29 Brain Teasers You Can Solve in Your Head
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Brain Games: Practical Tips to Boost Your IQ
by Adrian Tweeley
Narrated by  Weston Gritt
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Brain Training: How To Improve Your Mind
by Introbooks Team
Narrated by  Tracy Tupman
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Title: Easy Sudoku Brain Games, Author: Chris Saldrick
Title: Words for the Wise, Author: Richard DeSteno
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Mind Empowerment
by Instafo
Narrated by  Instafo
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Title: One-Minute Mysteries and Brain Teasers (Micro Mysteries and Brain Teasers, #1), Author: S. A. King
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