This book is a multi-purpose tool to give your brain as varied of a workout as possible. It offers all kinds of games at different levels of difficulty. In other words, everyone can find what they are looking for. You have just solved a logic challenge and here you are grappling with a word game. You’ve come up with a sudoku variant that gave you a hard time, and immediately you’re grappling with an unexpected cultural quiz. You have just played with maths and numbers in particular, and here you are facing a problem of observation and memorisation. What you need, in short, is mental flexibility and this book gives you the chance to test it and, above all, to improve it.

«The brain: if you cultivate it, it works. If you let it go and retire it weakens. Its plasticity is formidable. That is why you have to keep thinking.»

Rita Levi Montalcini