Few things have stimulated the imagination as much as infinity! It has all sorts of curious properties that at first seem paradoxical, but later turn out not to be. As such, it provides material for a book of brain teasers and paradoxes. The Witcher and his two young apprentices Annabelle and Alexander offer you a guided excursion through infinity here. They will visit, for example, an island where talking robots create other intelligent robots and program them to create more robots, which in turn create new intelligent robots and so on, ad infinitum. Through stories like this one, in addition to entertaining yourself with mathematical challenges, you will be able to learn about the pioneering discoveries of the great German mathematician and philosopher Georg Cantor. The Sorcerer, in typical humorous style, ends with a delightful tale of how Satan himself was tricked by a cunning student of Cantor. Even the neophyte will be able to understand the nature of infinity, Cantor's astonishing contribution (he was the first to put the subject of infinity on a logically sound footing), and a description of what might be the greatest mathematical problem of all time that, even today, still no solution!