This is the 2 volume set. Both books are in Fantastic condition, clean, unmarked, with strong bindings. They are also very heavy, almost 14 pounds! Whether you’re a doctor or just watch them in TV, these books will lay it all out for you. Parasites, bacterial infections, cancers, cardiology, kidney problems, gastroenterology problems, it’s all here. It is also full of diagnostic algorithms (which is really just a fancy way of saying flowcharts) that doctors use to come to their diagnosis. Fascinating stuff!