Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Competent, but not great

The books have become too formulaic. I don't think Pitt was even mentioned in the book, which is a bit of a novelty, as I think Kemprecos' other contributions to the NUMA series have included bit parts for Pitt.It's a delight to read a Cussler book in which he doesn't write himself into the book; I could do without such "cuteness."There's no love scene in the book, not much gratuituous violence, and no foul language. So it's PG or PG-13.I don't know why they made this new character 40 years old. If they wanted to introduce a new generation to replace the aging Pitt, why not make him 25 or 30?The book mentioned the recovery of a box from a shipwreck, and (unless I missed it), the only other mention was a reference to the recovery of a box containing an important list. I had expected a paragraph or two explaining how the box was opened and analyzed, etc. Perhaps it was there and I missed it.