The Knife Man by Wendy Moore
I've previously read and loved Wendy Moore's book Wedlock so was looking out for more by her. This one's a biography of Georgian surgeon, John Hunter. He was an unconventional pioneer of surgical techniques and anatomical investigations. He obtained (mostly via grave-robbing!) thousands of bodies to dissect, and as a result added an enormous amount to the world's knowledge of the human body. He didn't stop at humans - also dissected and experimented on animals, from dogs and sheep to exotic species brought back by explorers.
It's a fascinating read. If you're a bit squeamish I'd advise against it, but I absolutely loved it. Really well researched, easy to read, and very informative.