Samuel Johnson (1709-1784), the great lexicographer, journalist, conversationalist, inveterate London pub-goer and general good egg, famously remarked that if a man is tired of London, he is tired of life.
Another quote of his on London is less well known:
“Sir, if you wish to have a just notion of the magnitude of this city, you must not be satisfied with seeing its great streets and squares, but must survey the innumerable little lanes and courts. It is not in the showy evolutions of buildings, but in the multiplicity of human habitations which are crowded together, that the wonderful immensity of London consists.”
Which forms a pretty good introduction to the new, 640 page, Blue Guide London, hot off the press and available in a book shop near you VERY SOON.