Instruct: Classify Amazon reviews into positive or negative sentiment
Query: a good introduction

Excerpt from C# Online.NET Review (wiki.CSharp-Online.NET):"The author is quite well known in parts of the Microsoft realms. He is many times an author, a trainer, a speaker, and a developer. He is a good communicator--writing simply about a wide range of distributed application types, problems, and solutions. Often, he gives us sufficient detail to illustrate the case without resorting to tutorial-style, step-by-step instructions."