I found this book to be an entertaining tribute to Dante and his Inferno.  Inferno is, by far, my favorite canticle in the Divine Comedy, and the 2nd half of this book made me want to go and re-read it.  I did spend some time trying to decide if I found the author's use of the Inferno to be TOO derivative, or not.  I finally shrugged and said that it didn't matter - he had done a wonderful job of integrating the Inferno into his own work.