For general readers, Tyson (physics and optical science, U. of North Carolina at Charlotte) provides a nontechnical explanation of adaptive optics using a fictional romantic relationship as an analogy, humor, and simple illustrations to explain how they are used in astronomy, with lasers, and looking inside the eye. He describes how the turbulent atmosphere affects light, how telescopes are adapted to see through the atmosphere, what wavefront sensors are and how they work, laser guide stars, and how mirrors can deform to correct imaging. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)