<p>Did you know that an invisible mountain is rising above the streets of the capital - and, at over 1,400 metres, it is Britain's highest peak? This ingenious new book is an account of the ascent of Mount London by a hardened team of writers, poets and urban cartographers, each one scaling a smaller mountain within the city - from Crystal Palace (112m) to Primrose Hill (78m) - until the accumulative climb exceeds the height of Ben Nevis.<br...