They would be the stuff of nightmares – if only you could sleep. A neighbour’s sound system turned up a notch too high, the air a degree too warm, an ambiguous comment from the boss that causes your mind to race – the margins between a turbulent night and eight blissful hours are often thin. And almost everyone knows the feeling: when insomnia maddens us like an inner itch, when we can’t hold on to the night for the march of the dawn, when striving for what we want most of all is the biggest barrier to getting it. Insomnia hurts. Yet, five nights out of seven, we still have to work in the morning....