Instruct: Classify a given review into positive or negative sentiment.
Query: A little dispointed for an excellent book

This is certainly a good book about patterns. I found it clearly written by the author. Also he provided his own graphics symbols on the front and back pages in his book so we can understand the patterns in his book. However, he chose smalltalk to explain his codes. I think most readers are more familiar with C++ or Java than smalltalk. I wish he could provide those sample code on the addison-wesley web site (or his own site) with Java or C++. He promised (in his book, page xix) to put "further materials to keep this book alive". However, I did not see much update on this site or his own home page on this book.