Book excerpt: "The completion of the full circle of London Overground provides Iain Sinclair with a new path to walk the shifting territory of the capital. It is a route haunted by the unquiet voices of the city's many literary ghosts. With thirty-three stations and thirty-five miles to tramp--plus inevitable and unforeseen detours and false steps--he embarks on a marathon circumnavigation at street level, tracking the necklace of garages, fish farms, bakeries, convenience cafés, cycle-repair shops and Minder lock-ups which enclose inner London."--back cover.