Encircling London like a noose, the M25 is a road to nowhere, but when the author sets out to walk this asphalt loop - keeping within the 'acoustic footprints' - he is determined to find out where the journey will lead him. This book deals with the author's voyage of discovery into the unloved outskirts of the city.

Iain Sinclair is the author of numerous works of fiction, poetry non-fiction, including Lud Heat; White Chappell, Scarlet Tracings; Downriver; Radon Daughters; Lights Out for the Territory; Rodinsky's Room, with Rachel Lichtenstein; Landor's Tower; London Orbital; Dining On Stones; Hackney, That Rose-Red Empire and Ghost Milk; American Smoke and London Overground. Downriver won the James Tait Black Memorial Prize and the Encore Award. He lives in Hackney, east London.