"Firewall" is an exciting thriller written by the famous American writer Andy McDermott. The book tells about the tense world of cyber security and information threats. The main character, an information security expert, is wrapped up in a mysterious case - a hacker attack on a well-known bank. The reader, together with him, step by step reveals the intrigues and conflicts connected with the dark side of the virtual world. "Firewall" is not only an exciting detective story, but also an impetus for thinking about modern challenges and dangers of the Internet.