Books stated in very good condition will be close to new with minimal wear. Books stated good condition may have spine and/or cover wear, possible name, writing, highlighting, book store stamps inside. Fair/good condition will have heavier spine and/or cover wear then good but be better then reader/acceptable condition items. Books stated fair will be better then reader but will be worn copies. I live in a smoke free but not pet free home. I do buy a lot of books used though so may have one that comes from a smoker's home. Please ask if you want more information on an item.