Dead Lies Dreaming

 Eve Starcky and Imp are brothers and sisters, children of mages from mages family. They followed both different path, Eve being high in the corporate world and Imp being a vagabond trying to make a movie about Peter Pan. Eve is tasked to retrieve a book for her Boss and she charges Imp and his band of merry men to capture it. They have to rehash their past and fight off people with guns. And find the book in their family home behind a door to a place set in dream world that set the dreams of London Past. 

 Somehow, Stross deviates from the Administration setting where the other laundry files books were set. It's still funny, to some extent, and it's more adventurous -- but we don't have anybody present really from the past books, except for the Black pharao.