This little book is packed with information that will enable cruisers and racers alike to better grasp how sails, keels and hulls work together to keep boats afloat, and it will sharpen their skills with a more subtle and thorough appreciation of why various boat design features are present and why certain tactics work in specific situations. Anderson outlines the science behind sailing in a way anyone can understand and benefit from without having to trudge through a physics text or become a naval architect. The concepts are conveyed simply and concisely, with many fine illustrations to guide the reader. The perfect book for all those sailors who want to enhance their understanding and enjoyment of life at sea.