In the world of modern business, information is everything. That is why there is a real war for its possession. In order to protect yourself from unscrupulous competitors, you must not forget about espionage directed against you, and sometimes you have to use countermeasures. In the book, the world's best specialists introduce you to the secrets of their craft - from data encryption and detecting bugs in the workplace to photographing confidential documents and restoring destroyed materials. In addition, the authors share real-life cases of professional spies in the CIA, KGB, Fortune 500 companies, etc. Now you can use their methods to your advantage!.