Ever wondered if there's more to the world than meets the eye? If maybe, beneath the surface, a whole other realm of wild possibilities exists? Tim Powers certainly has, and in Declare he takes us through a joyously inventive trip through the supernatural world underpinning the events of the Cold War. Taking as his lead the life story of the treacherous double agent Kim Philby, Powers' story takes us through war-time Paris, Cold War Berlin, and the supernaturally-charged Middle East as secret agent Andrew Hale, a man with a strange, hidden bond with Philby, struggles to complete a long-running operation called Declare - an operation to prevent the USSR from forming an unstoppable alliance with the djinn, the powerful creatures of Arabian myth. Powers' strength lies in evoking the sensation of huge, supernatural presences existing just off our limits of perception, and the psychological effects on those who become all too aware of their existence. He also perfectly captures a sense of place - in particular, scenes set in the Arabian desert will send shivers down the spine, the reader there, sharing the attention of unknowable creatures. Though some elements perhaps don't work as well as they could - the love story between Hale and a former communist agent feels a little underwritten - the giddyingly complex plot ensures that the reader is never bored, and that when the book is closed for the last time it is done with the satisfaction of having read a fantastic novel. Thoroughly recommended.