This book is a collection of interviews and essays on McCarthy's works (mostly Blood Meridian and Suttree, but also ATPH, Gardeners Son, and Stonemason).
I found the interviews to be the most rewarding. In particular there's an interview with the late Harold Bloom and the author, Peter Josyph about Blood Meridian. This alone is worth the cost of the publication. The conversation is great and Bloom offers a novel interpretation of the Blood Meridian epilogue. The interview with Rick Wallach (founder of the Cormac McCarthy society) is also good. There's some interesting background on the nascent rise of McCarthy scholarship beginning with the correspondence between Sepich and McCarthy as well as the first dissertation. Their conversation also touches on some of the common themes of Blood Meridian. Fans of ATPH won't want to miss the interview with Ted Tally who wrote the screenplay.
The essays by Josyph are good too. One of them is titled Blood Music, and touches on quite a few things, from the nature of spitting (which after reading the essay really does stand out in the novel) as well as why we should (or shouldn't) care for any of the characters in Blood Meridian. You don't realize it but it's interesting how McCarthy carefully makes us empathize and root for the Kid even though he's a terrible human. Josyph explores some of the techniques McCarthy uses.
For those that feel moved and find themselves constantly coming back to McCarthy's work, you can't go wrong picking this book up. It's going to reward and enlarge your appreciation and understanding of McCarthy's works.