The Regent's Canal: An Urban Towpath Route from Little Venice to the Olympic Park by David Fathers. Interesting facts, lovely maps.
LONDON: The Information Capital: 100 maps and graphics that will change how you view the city
Mapping London: Making Sense of the City
London Thames Path
Bizarre London: Discover the Capital's Secrets & Surprises
Tea and Cake London
London Villages: Explore the City's Best Local Neighbourhoods (London Guides)
Tired of London, Tired of Life: One Thing A Day To Do in London