I found this supremely well written, balanced between the smooth telling of a suspense (who-done-it?) and just enough grounding in science history to keep both strands readable.
He kept the human context alive with the patients he followed and he showed humility in the way he never presumed to be more than a learner even after he became a qualified specialist.
The best science books are those that kindle the feeling of awe at life and the universe. Here there is awe at the perseverance of many to find cures and even awe at the incredible wily supreme survivor, the disease itself.
The only reason I didn't give 5-stars was because there wasn't enough of the patients perspectives, but perhaps I'm being unfair, the subtitle is "a biography of Cancer" after all.