The EDE Book by Steve Socransky and Ray Wiss
The editors of these texts (and their chapter contributors) are Emergency Physicians, and it shows. Their approach, while detailed enough to keep you going in ED ultrasound for years, is still focused on the non-radiologist. The works are well-written and copiously illustrated. The descriptions of more advanced applications are clear and concise, making them easily accessible.
Echo Guided Life Support by J.F. Lanctôt, M. Valois, M. Lorenger, S. Rhein