Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be careful of formats

Be careful to inquire with the seller about what version is being advertised and shipped. There is a hardbound 335-page book which is the full version, and there is a 143-page paperback executive overview version that only includes part 1 of the full book.I ordered what I thought was the hardbound version and was dissappointed to actually recieve the paperback version from the seller, which did not disclose this in their item description. I suspect there are others like that judging from the variance in prices. I have returned the paperback and now have the hardbound and am happy.