I would suggest reading Unit 731 (
http://www.goodreads.com/book/show/1616555.Unit_731). It's about human experimentation during WWII. It's quite a shocking read, but a very important document to me personally, as an Asian (may I never forget). You'll also get to know a little more about the US and other countries, and why the criminals were never prosecuted or even brought out into the public light.
it's sad how human progress is marked by tragedies. to think that medicine was helped alot by the work of criminals and supposedly democratic countries is a very sad truth, and I get angry every time I think of this book. It was a hard read for me.