Probably my favorite King book. It offers a great deal of profound insights not only into Mr. King himself but also into his thoughts on writing.
Let me update and expand on this a bit. When I read it, I discovered (or at least I believed I did) that it provided me with many valuable insights into Mr. King. (Of course, he might be laughing and saying, "So you think. You've fallen into my trap." Just a thought.) With biographical sketches, real-life stories, and accounts of his own writing experiences, it's truly worth the price.
Also, at the time of reading, I found the list of his favorite books in the back extremely interesting and spent a significant amount of time at the library attempting to locate them. This was a greater challenge then as I resided in a smaller city and the library didn't have nearly all the books he listed. Since Danse Macabre was written in 1981 and it's now 2011, a new list and a follow-up book would be of great interest.
So, although I'm not strictly a die-hard King fan, I really liked this book.