For a sailor interested in weather, there are these days a myriad of marine weather books written with ever increasing sophistication and complication. I've read, even studied, many of them; and most have value. But this is the one that I reread before every season (and this will be my fifty-seventh sailing season). There is a simplicity and clarity to Sloan's explanations which, coupled with his wonderful illustrations, make this book superb and unique. I suppose that technophiles might quibble with the fact that this book does not include a few ideas or concepts that we now know, but which were unknown in 1949 when the book was first published. But that doesn't qualify what I've said about its excellence. Even if your interest involves weather fax, GRIBS, and 500mb charts, there is literally no better book to explain the basics of how weather happens. And, if, like me, you no longer cruise, but just day sail or make the occasional overnighter, this book coupled with last night's TV forecast, a decent barometer, and Alan Watts' INSTANT WEATHER FORECASTING, is pretty much all you need. ERIC SLOAN'S WEATHER BOOK is really in a class by itself.