This was a gift for my sister,she is retired from schoolteaching and always debates in conversation others usages of words from television and print,i wanted to get her a reference worthy of her endeavor to occupy space on the gift she just received from my daughter,custom bookcases.Not being a scholar i did a little research started by a mention of oxford on NPR and i relied on reviews like this to make my decision.I didn't think i would spend this much because it is always a problem spending too much on anything for her and suffering her wrath,I made the right choice,she hardly complained about the price at all she was so taken by the package,the content,the history,everything.She uses it all the time and now i can trust her calls on language usage.This one worked for me,i think anyone would be happy here!!!!!