Plagiarism is a common occurrence in India. There is very little original research work in universities and Intellectual Property laws are rarely enforced. Ergo, every two-bit college professor regularly "authors" books to supplement their paltry income. These are mostly marketed to their own students as a way to pass exams, and nobody claims to have done the original research. Guys like Rahul Tyagi and Ankit Fadia just had the chutzpah to believe their own hype. The real worrisome fact is that nobody in Corporate India knows enough about security to call out these charlatans.