The Emperor of All Maladies - A Biography of Cancer, by Siddharta Mukherjee
This is really a great book. Mukherjee tells the history of cancer as a story, almost like a thriller, extremely engaging and exciting, and never losing the human perspective. Very scientific, and I think easily understandable by lay people. It presents a very realistic and optimistic view of the near future of cancer medicine, and the narrative of past therapies - sometimes appalling - is extremely interesting and informative. I recommend it to anyone interested in the history of cancer and medicine.