What can be better than a resource that goes through undifferentiated complaints. This book is great for anyone going into EM (3rd, 4th, and interns). Use this book during your 3rd year to prep for step 2 since undifferentiated complaints that can lead to significant morbidity and mortality are what step 2 tests. Great for EM rotations (fits in white coat pockets). Most services all have emergency department consults and this book goes through how to initially approach these patients. Easy to read and gets the essential points across.