In September 2001, a young Iranian journalist, Hossein Derakhshan, created one of the first weblogs in Farsi. When he also devised a simple how-to-blog guide for Iranians, it unleashed a torrent of hitherto unheard opinions. There are now 64,000 blogs in Farsi, and Nasrin Alavi has painstakingly reviewed them all, weaving the most powerful and provocative into a striking picture of the flowering of dissent in Iran. From one blogger's blasting of the...