John Roberts has been sailing and writing for 20 years. His articles have appeared in Yachting, SAIL, and Sailing World. He finished his 36-foot cruising sailboat Sea Sparrow from a bare hull with his wife, Susan, has sailed her to Maine, Bermuda, and Central and South America, covering more than 25,000 miles. His previous books are Fiberglass Boats: construction, Repair & Maintenance (Norton, 1984); Choosing Your Boat (Norton, 1986); The Boating Book (1991); and Why Didn't I Think of That? (International Marine, 1997).