
There are two non-fiction books I've read/am reading that are hard to put down.
The first is
The Big Short by Michael Lewis. I've read a couple of other books on the financial crisis, but this is the best. By the end, you really feel that you understand what the traders were doing that brought down their respective companies and the mortgage companies. Lewis has written several other books, but his first major seller was
Liar's Poker about his own experiences on Wall Street.
This weekend I have been reading
The Emperor of All Maladies 
by Siddhartha Mukherjee. It is a "biography" of cancer. Mukherjee relates the history of cancer treatment. He explains surgery, chemotherapy and radiation treatments in understandable terms. He touches upon ancient, 17th, 18th and 19th century surgeries for cancer (terrifying). He includes just the right stories of actual patients to keep you involved. The scientific research and the politics behind funding for research & what treatments are accepted is at once horrifying and fascinating. One of the best books I've read on the history of a disease. It's just amazing that I haven't been able to put the book down.