‘What the fuck happened?’ said Strike, descending the stairs. ‘What d’you mean?’ said Robin, taken aback. ‘I’ve been worried fucking sick, I thought someone had grabbed you off the fucking street!’
I think I know why I like the 'I'm fucking thin?' quote and the two above and this one - Strike tends to drop the f-bomb more when he's worried about Robin, and covers it up/deals with it by swearing and shouting - very English of him

