False charges of racial profiling threaten to obliterate the crime-fighting gains of the last decade, especially in America's inner cities. This is the message of Heather Mac Donald's new book, in which she brings her special brand of tough and honest journalism to the current war against the police. The anti-profiling crusade, she charges, thrives on an ignorance of policing and a willful blindness to the demographics of crime. In careful reports from New York and other major cities across the country, Ms. Mac Donald investigates the workings of the police, the controversy over racial profiling, and the anti-profiling lobby's harmful effects on black Americans.