His lone withdrawing figure blended anonymously with the darkness, Dr Raven's quick, light steps becoming gradually distant, drowned out by the clicking staccato rush of trains, the steady drip of rainwater, and the clock of a nearby church as it heralded the hour.

Books are a portable kind of time travel. We go back as well as forward when we read them. When we come back into the now, after being immersed in worlds previously unknown to us, we find ourselves, transformed. Touched by their magic, nothing we ever perceived beforehand remains quite the same.