This is the opposite of a problem.
TO DREAM THE IMPOSSIBLE DREAM
The best bit was he tweeted Waterstones and politely asked them to let him out.
No-one from Waterstones was on their Twitter account at that time of night, but half of London was still awake and soon after #WaterstonesTexan and #FreetheWaterstones1 were trending across the city. The police were notified and managed to let him out before midnight 😀
The actual best bit is that Waterstones then held a competition to win places at a sleepover in their flagship store on Piccadilly because so many people started talking about how they’d love to spend the night in a bookshop. That’s how you turn a negative into a positive.