Book excerpt: The Book of Echo is concise yet comprehensive, focused on the adult echocardiography. It is written to be the echo book that echocardiographer, echocardiography fellows, cardiologist, cardiology fellows, and cardiac technicians read without having to navigate through large books looking for practical or diagnostic clue. The book has 20 chapters with more than 600 illustrations covering basic technical aspect to more advanced diagnostic techniques. All provided information are in accord with the latest available echocardiography guidelines. Topics include basics physics, image acquisition and optimization techniques, echocardiography enhancing agent, stress echocardiography, echocardiographic diagnosis, introduction to congenital heart disease, and interventional echocardiography.