I won't bother singing this product's praises, you only have to google it to find almost universal praise. It is simply an excellent book. I do however want to give Goodman Games some feedback on the pdf version. Every interior page has a grey background. While this may look good hot off the professional print press, it's not so good for the home desk top printer, which doesn't have the same level of quality. Not only is it an unnecessary waste of ink, but the small font of the charts can be a bit difficult to read against the grey background.