Has this ever happened to you? You're out on a leisurely bike ride with friends, and suddenly you're going downhill. Everyone is excited, but the pessimists are already dreading the next uphill climb. In any case, not everyone reaches the bottom at the same time; the heavier riders show us their backsides and zoom past; they are simply faster. Or is it like the cherries in the neighbor's garden? They always seem to be bigger. For this and many other problems, Norbert Herrmann has the solution. As in his other two books, "Mathematics is Everywhere" and "Can Dogs Count?", the author brings his discipline out of the scientific ivory tower and provides amusing insights into mathematical thinking. His enthusiasm and joy for mathematics are evident in every line of the book, offering a deep understanding of what mathematics can truly be.