Tiny, Tiny Babies: All You Need to Know About Pediatric Medicine

Found at the Crimson Caravan vendor. Can be stolen as well. On the 360 if you attempt to buy it, the game will glitch and freeze up on you, so until that is fixed you need to steal it. (As of October 25, 2010, I was able to purchase both Stress and the Modern Refugee and Tiny, Tiny Babies without any glitching.)