A surfboard is a simple device, but the lines that comprise its shape and how they interrelate are very sophisticated. Sophisticated, but not difficult to understand if you know these design basics. If you¿re a beginner, advanced, or top pro surfer, understanding these basics will help in your choice of a surfboard. This book will help you isolate problems you may experience while riding a particular surfboard and how to correct them. It will help you talk to your shaper if you decide to go custom. Shapers; this book is especially for you. You work with these basics on every surfboard you shape and you¿ve learned what works, but you¿ve probably never seen an accurate description of how or why. Do you know how to discover what a surfer really wants (often different than what he says)? The answers are contained in this book. This volume is designed to enhance understanding and stimulate advances in surfboard design.