"What Hedge Funds Really Do" provides a needed complement to journalistic accounts of the hedge fund industry, to deepen the understanding of nonspecialist readers such as policy makers, journalists, and individual investors. The book is organized in modules to allow different readers to focus on the elements of this topic that most interest them. Its authors include a fund practitioner and a computer scientist (Balch), in collaboration with a public policy economist and finance academic (Romero).