Trainieren Sie Ihr Gehirn: Mentales Zähigkeitstraining, um jetzt im Leben zu gewinnen!:
20,16 €
You can't go wrong with this book because it's written to improve your cognitive skills and throughout the process your brain will not be overworked. Once you start seeing what a positive difference these improved cognitive skills can make for you, you'll wonder why you didn't start putting these things into practice sooner.
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