If you've read Marsh's Do No Harm and you're interested in more stories like it, I strongly recommend When the Air Hits Your Brain: Tales from Neurosurgery[1]. Its author-surgeon (Frank Vertosick) lacks much of the compassion shown by Marsh, but the stories cover his failures more than successes. I find failures and mistakes more interesting, as there are countless ways in which an operation can go wrong, but only one way it can succeed. Though sometimes morbid, the cases are always fascinating.

1. http://www.amazon.com/When-Air-Hits-Your-Brain-ebook/dp/B006...