Book excerpt: The Navy of the 21st Century, 2001-2022 presents an all-inclusive listing of the ships that have served in the U.S. Navy since the start of the new century. The newest and sixth volume of the U.S. Navy Warship Series provides insight into the technological innovations and modern weaponry featured in newer naval vessels, as well as controversies over the naming conventions of ships over past decades. The text contains specifications and illustrations for all the ships and submarines that have helped the U.S. maintain the world's largest and most powerful navy to the present day. Many new developments have occurred during this period, and several new types of ships have emerged. The book includes latest developments such as the unmanned seagoing drones, as well as those now under construction or projected. Ships of other government departments, such as the Coast Guard, NOAA and the Army, that would be used in conjunction with the Navy are also highlighted. This is an essential reference volume for scholars and institutions specializing in American military history, policy, and strategy.