Book "Idea after полцарства"! it is fourth from series "Library the World 2.0". This enthralling reading for those, who loves unexpected guess-work, turns of inventive idea.The Spanish grandees and captive French king, Russian traveller Сундаков and French philosopher Michel Монтень, ancient Greek hero Achilles and group "Beatles" and many other personages will meet to you on the pages of this book. All of them appeared in such situations, when, to survive or go out winners from a fight, it was necessary to show a shrewdness. And it succeeded them!More than 90 sharp problem situations are collected in a book.A book is addressed to the curious teenagers and adults : to the parents, teachers aspiring to do the lessons interesting, workers of the system of additional education.