My friend Arianna Huffington's new book, The Sleep Revolution, on the science, history and mystery of sleep, is coming out on April 5th. I'm pleased to be able to share a sneak preview here on my blog, particularly one that looks at how sleep deprivation affects women. As Karen Brody, founder of the meditation program Bold Tranquility, told Arianna, “I coach busy women and this is what they tell me all the time: ‘I spent years getting educated and now I don’t have any energy to work.’”