This book is a detailed study of recent changes in security threats and defense forces in China, Taiwan, Japan, South Korea, and North Korea. The author argues that East Asia is in the midst of an arms race “of unprecedented scale” (p. 231). The major threats (“flashpoints”) in the region are the tensions between North and South Korea, the conflict between the People's Republic of China and the Republic of China over the future of Taiwan, and the competing claims to oil and other natural resources in the South China Sea. The range and character of these threats have not changed appreciatively in recent years, but what has changed are capabilities of militaries to project power, threaten neighbors, and destabilize the region.