This is the 8th book in the continuing series chronicling the tale of Lucifer, Morningstar "First of the Fallen".
Mike Carey has created an incarnation of Lucifer who is both devil and angel, proud and terrifying, but rational and philosophical.
The series really has to be read from the start and in sequence, but it contains stories of great depth. The themes of freedom and creativity are drawn out through powerful metaphors and cloaked in the guise of horror/fantasy. There is some sly humour and plenty of action to keep the casual reader interested and the art is uniformly excellent but it is the philosophical/metaphysical aspect that makes this a book for mature readers rather than the occasionally graphic violence.
In addition to the 4 part story " The Wold Beneath the Tree", this book also features two excellent stand alone stories "Lilith" and " Neutral Ground".
"Neutral Ground" is an interesting side-story about a guy who is possessed by demons.
The pick of the lot is "Lilith" which has an excellent story about Adams first wife and her part in "the fall" . It also features exceptional art from P Craig Russell.
If you've been buying the earlier books don't stop now.
If you haven't started yet, please do. This stuff is in the same league as Neil Gaiman's "Sandman" and no mistake.