In 'Do No Harm,' Henry Marsh, a distinguished neurosurgeon, takes us on a profound journey into the intricacies of the human brain and the turbulent reality of brain surgery. This intimate memoir exposes the delicate balance between life and death that neurosurgeons navigate daily. Marsh shares visceral accounts of his operations, where the difference between success and catastrophe is imperceptibly thin. Readers are granted a front-row seat to the moral and ethical dilemmas surgeons face, the overwhelming joy of a life saved and the devastating aftermath of surgeries gone awry. Amidst the chaos, the memoir remains a testament to humanity and the inextinguishable hope that rests at the core of every medical decision.