Links to books about pi

• Ramanujans Notebooks (B. Berndt)
• Pi and the AGM (P. and J. Borwein)
• CRC Concise Encyclopedia of Mathematics (E. Weisstein)
• Pi - A Source Book(J. and P. Borwein, L. Berggren)
• Le fascinant nombre Pi (J.-P. Delahaye)
• The Joy of Pi (D. Blatner)
• Pi - Unleashed (J. Arndt, C. Haenel)
• Pi - Algorithmen, Computer, Arithmetik (J. Arndt, C. Haenel)