Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Hack Attacks Revealed

Hack Attacks Revealed is one of two books which present in a clear and understandable language how computers and networks are attacked. The first volume teaches basic TCP/IP and port usage covering many operating systems. Further it explains the risks and perils to be found and faced by not only the people who administer systems connected to the internet but also everyone with a high speed connection to the Internet.This book gives great detail and offers a set of tools which allow the reader to test and explore their own computer or network in order to safeguard themselves and the companies they work for.If you can only buy on ebook, then this is the one to get.