The unfamiliar terrain of Britain's American colonies made it vital for both sides to gain knowledge of enemy troop movements during the Revolutionary War. But acquiring that information called for a level of espionage that neither side was prepared for, requiring both to make up many of their operational procedures as they went along. Rose (Kings in the North ) focuses on a small band of Americans, longtime friends who created an intelligence network known as the Culper Ring to funnel information to George Washington about the British troops in and around New York City. The author quotes extensively from their correspondence, showing how contentious the relationship between the general and his spies could get, especially when Washington thought they were underperforming. Rose also delves into technical aspects of the Culpers' spycraft, like their attempts at cryptography and invisible ink. Although his story is compelling in its descriptions of occupied New York, where patriots and loyalists lived together in an uneasy balance, it is diffused somewhat by lengthy digressions into the more well-known spy tales of Nathan Hale and Benedict Arnold. Be sure to follow along with the footnotes, too--Rose works in several more anecdotes among his documentation. (May 2)[Page 48]. Copyright 2006 Reed Business Information.