Pickover succinctly describes famous formulas and groundbreaking mathematical concepts, complemented by interesting biographical details of mathematicians and practical application examples. Accompany the author on his journey to 250 achievements of mankind from the discovery of the Platonic bodies to the invention of zero, the introduction of the abacus, the production of computer-generated fractals to the search for new dimensions. The spectrum ranges from ancient philosophers and thinkers such as Euclid, Pythagoras and Plato to mathematical geniuses such as Gauss and Euler and modern icons such as Paul Erdös and cosmologist Max Tegmark. The short entries, which only take a few minutes to read, are presented in chronological order and with an illustration appropriate to the respective topic.