If you want to know what makes a boat fast, slow, stable, unstable, seaworthy, comfortable or ideal for the things you want it to do, here’s a perfect place to start. Longtime boat designer Roger Marshall tells you what you need to know about hull design, engines, drive trains, steering systems, comfort factors, safety features and construction methods. He translates the jargon, explains the key concepts and offers a wealth of insights into what makes powerboats tick.