Instruct: Classify a given review into positive or negative sentiment.
Query: By far the worst book on C#

Of all the C# books I own (I own 5), this is by far the worst. Can you learn from this book? Sure, but you have to deal with mistakes in the code examples, crummy explanations of how C# works, and bad editing.The numerous authors of this book have 50% overlap in their coverage, but each of them miss the point in their explanations.