The document provides instructions for writing a critical essay comparing social networking sites mentioned in a book with one not mentioned. It specifies that the essay must: 1) Compare a site not in the book to at least two sites that are mentioned. 2) Discuss what has changed and remained the same between the sites since the book was written. 3) Include an in-depth case study of one social networking site, with a specific analysis supported by concrete examples. The essay should follow academic writing guidelines regarding tone, citations, quotes, and formatting.