How to think series

Do you want to train your mind? Do you want to escape the risk of an Alzheimer disease? Are you interested in protecting your mental health? Do you want to become and remain a genius? And, at the same time, do you want to have fun?

Well, we are proud to present you our new series "How to think" for a clear, sharp and productive mind. Each book has 50 riddles that develop and enforce a particular way of thinking.