Instruct: Classify the given Amazon review as either positive or negative.
Query: the best book I have ever read

I am a biochemistry student in mainland China. I have long wanted to have this book, but unfortunately the book is not available in China. Last month, my friend who is a Canadian citizen bought this book in North America and gave it to me as a present. I was greatly delighted. This is the best molecular and cell biology textbook I have ever read. And I have spent many pleasurable hours reading this wonderful book.