The cover is pretty beat up (though still in the identical condition I bought it in a year ago--and never used; the student I was going to tutor with it ended up not needing my help) and several page corners are bent. I've also noticed a sporadic pencil mark amongst the pages (I erased the two marks I found, but, obviously, there could be more). None of the marks I saw had anything to do with solutions to problems, so it's still a clean book in that regard.