I read Killing Floor a while back, but have recently read The Enemy, Die Trying, Tripwire and I'm close to finishing Running Blind (I've had the flu for 10 days and reading is the only thing making me feel human).
I have to say, all the references to Reacher's physical description (prevalent in all the books) make me smile a bit. It's pretty funny that Child is now saying that his character's physique (and his frequent mention of it) was nothing more than a 'metaphor'. Ha!
If he continues writing the Reacher series, I'll be curious to see if there's any further descriptive mention of his 6'5", 225 lb., blond-haired, blue-eyed ex-MP-now-turned-drifter.