Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Must have book

Daniel Gruber does a brilliant job describing the origin of Rabbinic Judaism. Although I somewhat agree with his thesis that Rabbinic Judaism started with Akiba, I tend to lean in the direction that Jose Ben Josezer was the one who started Rabbical Judaism. In either case, a well written book with almost a third devoted to references. As a side note, I saw two used books going for $235.00. Why would any pay this much when you can buy a brand new book from Daniel Gruber website for under $25.00. Just google his name.