The book sounds interesting too. His description:
It's a thriller, I suppose, although as many of the thrills occur in headspace as in real life, and it's a murder mystery; it's a travel guide, and it's the story of a war. It's a history. It's funny, although the humour is pretty dark.I'm not too familiar with Gaiman's work, but I'm probably going to check this book out because Neverwhere rocked my world and he seems like a great writer.