It's called A Bestiary of Authors and runs throughout August during the Edinburgh Festival. Rex here is holding up the postcards so you can see them. He's one of the dinosaurs I made as window props years ago and very well behaved.
There are 34 authors in the show - famous and not quite so famous yet - rendered as full colour or black and white photographs or as solvent transfer prints. I'll post a bit more about it here once it's open but I'm up to my ears in getting it and it's attendant website ready just now. Meantime, head over to My Myspace page for a little more detail or to the Fringe programme for venue details and opening times.