It's also the best comic I've ever read (yes, better than Sandman), and is up there with one of the best books I've ever read.
See more of it here, and if you like Gaiman, and you like Sufi poetry, just get the darn thing already. XD
There's a bit of an interview here, with the author. I'm not sure where all this 'White Man's Burden' stuff that the interviewer talks about is coming from. I don't remember any white folk in the book at all. But then, since I'm not any of the ethnic groups in that thaar book, maybe that's why I missed it.