"Impossible Worlds" is a very big, very heavy and very expensive hardback book. It will cost you around 25 to get a really good condition one with the full set of art cards included. This is definitely not that. Some ex-library books are really rather good bargains, but sadly this one has taken a lot of knocks, especially on the corners, and has innumerable library stamps and stickers on it too. And of course the pouch at the back that's supposed to contain the big stack of exclusive art cards is empty. Overall not very good at all, and if this were a 5 book I would have binned it, but it's not, it's a 25 book I thought somebody else might get some joy out of. The Matt Irvine "Special Effects" softback book is also ex-library and has some stickers and stamps but overall it's really not bad at all. The 1975 scripts hardback book is NOT ex-library, and is generally in excellent condition, but it does have a torn dust jacket which has been repaired with sellotape.