Tsunamis are infrequent but terrifying hazards for coastal communities. Difficult to predict, they materialize with little warning, claiming thousands of lives and causing billions of dollars in damage. Now a groundbreaking new approach to tsunami detection and warning developed by an international team of researchers that relies on low-cost underwater sensors and networks of smartphone communication gives at-risk coastal communities an economically viable, scientifically sound means to protect themselves. Hazardous Seas, edited by disaster preparedness experts Louise K. Comfort and Harkunti P. Rahayu, is an invaluable guide for policy makers and international NGOs looking to save lives from tsunamis and mitigate crippling damage to communities. It also provides a comprehensive overview of tsunami detection and warning for students of engineering, computer science, planning, policy, and economic and environmental analysis.