Instruct: Classify a review into positive or negative sentiment.
Query: Disappointing

Having recently bought a comprehensive Billy May discographyfrom the same publisher, this title was disappointing. I wasexpecting to finally have access to a complete Nat Cole discography only to find out that the "pop" recording sessions are omitted. The book's devoted to Cole's jazz output (mostlytrio work). At the time the Cole's career takes off (@1950)the book tails off, offering virtually no information on thelast 15 years of Cole's studio work. The book's not without value, but certainly not a comprehensive look at Cole's recording career.