I’m usually a lukewarm John Grisham fan. I was a youngish paralegal when he hit it big with The Firm, but I found too many holes in the next few legal thrillers to enjoy them much. I’m too much of a southern girl not to love A Time to Kill and I like some of his non-legal stories. I love what he did for the Oxford American. All in all, you could say there are writers I usually like more but that’s not true today. Today, I found out about Gray Mountain and this evening, I read the book. I had to because this Grisham thriller touches a field close to home. This is his book about coal. For those who don’t know, coal generates a lot of the USA’s electricity. Right now, it supplies about thirty-nine percent, more than any other single source, and that’s way down from what it used to be. Coal mining is a big, tough industry and it has a huge impact where I live. People have jobs and incomes here that they probably wouldn’t have except for coal. On the other hand, the toll mining takes on a human body is scary. Even with…