“[Idris] Khan creates multi-layered photographs, often of appropriated art and books, in a way that both augments the aura of the original and reveals the idiosyncratic trace of his own hand.” I guess I keep coming back to the issue of copyright? Or maybe not? In any case, this is your chance to see all Becher watertowers in one. As much as I like this, I have to note that Idris Khan’s approach was also used by Jason Salavon - this bit of information for those people who just hate to see something that they have seen before. There is a fine article by Geoff Dyer in The Guardian, which you don’t want to miss - regardless of what you think about Idirs Khan’s work.