4.0. I think some of you may be hammering this one a bit. It doesn't have any outstanding defects. It's biggest crease is maybe 3" at most. There's a lot of accumulated edge, spine and corner wear yes, but you need a bit more or a standout defect(s) to plunge into 2.5/3.0 territory. The staple understandably has the mileage of 2 staples but the book is pretty clean, color is nice and there aren't any substances, chips or pieces missing. No stains from what I can see either. I would expect dirt, maybe a stain or two, rusty staple, huge dogear, or a 1/2" piece missing on a 3.0. This copy isn't that bad. It has the look of a textbook VG and I'll put $20 it comes back in a 4.0 (or better) holder