Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointing

I have a large collection of Osprey books which are very good but this book is a disappointment because it is not very accurate. Most of the material in this book came directly from wartime intelligence publications with mistakes which have not been corrected. There are too many mistakes to cover them all here but one example is on the first line of page 58 which says that "the portable steel pillbox was only encountered during the November 1943 assault on Betio." This is wrong because there were some encountered in the Aleutian Islands. More and better research should be done before a book is published.