Ask most women whether they have the right to equality at work and the answer will be a resounding yes, but ask the same women whether they'd feel confident asking for a raise, a promotion, or equal pay, and some reticence creeps in. The statistics, although an improvement on previous decades, are certainly not in women's favour - of 197 heads of state, only twenty-two are women. Women hold just 20 percent of seats in parliaments globally, and in the world of big business, a meagre eighteen of the "Fortune" 500 CEOs are women. In "Lean In", Sheryl Sandberg - Facebook COO and one of "Fortune" magazine's Most Powerful Women in Business - looks at what women can do to help themselves, and make the small changes in their life that can effect change on a more universal scale.