Trojan Horse is Mark Russinovich’s second novel dealing with the very current theme of computer hacking and cyber warfare. His first book Zero Day dealt with a terrorist release of a new computer virus. This book goes deeper and looks at trojans and the threat we face from malicious software that can embed itself in our most sensitive systems. The story is straight thriller with complex sub plots that keep you engaged. The strength of this book, and his first, is the way he explains some very geeky and complicated computer software operations. Whether a blackhat hacker or a computer newb, you’ll understand what is going on in a computer when infected with malware. If you know what “stuxnet” was/is and are into thrillers, this book will entertain you, make you update your AV defintions, run a scan, and do that back-up like you meant to.