Eric Graig asked me an interesting question. He asked "If I were going to buy only one of your products, which would you recommend - the book or the laminated sail trim chart?Well, it depends on your level of sail trim experience. The SAIL TRIM CHART tells you WHAT to do and THE SAIL TRIM USERS GUIDE tells you WHY you are making a particular sail trim adjustemnt for your main and jib. So, if you have a complete understanding of draft depth, draft position, twist and angle of attack and have a complete understanding of the 8 to 10 mainsail sail trim controls and the 5 or so jib controls and know exactly what happens when you push or pull either of them than your in pretty good shape. You also have to know what part each sail trim control plays in the adjustment of draft depth depth, draft position, twist and angle of attack for the main and jib plus you need a good understanding of what your telltales are telling you. Frankly, if anyone is at that level, they really don't need my chart and book!!!!The Chart is actually an outline of the book. The sequence of events was that I made the chart for myself because I thought I was the only sail trim idiot on the face of the earth. I had no idea what to do. Soon I found there was a market for my Chart. On day, about 4 years ago, I causually answered a sail trim question over on another network and happened to mention I had a sail trim chart. Inside of 3 days, I received 75 request for the chart so I knew then that I had something. Unfortunately, I had the chart but only I could read it!! I quickly organized it and the rest is history - I've sold over 10,000 of them to sailors worldwide. The book came after sailors said we know WHAT to do but we don't know WHY, so I wrote the book and have sold about 2000 of them. Incidently, the WHY is EVERYTHING. There has to be a reason for every sail trim adjustment. If I were a beginner to high intermediate, I'd buy both. It's chaeper than a case of Sam Adams and we all know what happens to the Sam Adams. For the same amount of $$$, you get to keep the chart and book!!! Maybe some of you mates who have bought my products can help Eric out with his buying decision?