Never in the 4000 year history of research into Pi have results been so prolific as at present. In their book Jörg Arndt and Christoph Haenel describe the latest and most fascinating findings of mathematicians and computer scientists in the field of Pi. Attention is focussed on new methods of computation whose speed outstrips that of predecessor methods by orders of magnitude. The book comes with a CD-ROM containing not only the source code of all programme described, but also related texts and even complete libraries.