In today?s globalized and digital era, infringement of copyright is an important issue which requires considerable thinking and how we can help in resolving the problems arising out of infringement of copyright. The big question is how far it is transferable and up to what extent it can be used for advancement and development of knowledge society. Preventing infringement of copyright in today?s world of information explosion and the role of a librarian in doing so is discussed in this book. The present book is a short and brief commentary on the above subject . The important enactments dealing with this subject can be enumerated in brief as follows: Copyright: History and Development, Copyright Act 1957, Duration And Infringement, Copyright Office and Copyright Board, Universal Copyright Act, Digital Millennium Copyright Act (DMCA), International Copyright Act and Intellectual Property Right. Useful appendices has been provided to further add to the value of the book. Topics discussed include Digital Millennium Copyright Act (DMCA), World Intellectual Property Organization (WIPO Treaty), Sonny Bono Copyright Term Extension Act (CTEA), Technology Education and Copyright Harmonization Act (TEACH) etc along with the recent developments on part of the Government/society in this respect. This book should be useful to librarians, information scientists, educationists, and the persons working in revenue, law, judiciary, advocates, students of law, police departments, business executives and even for a common man. However, its success remains in the fact how effectively copyright is protected in our day to day life by a common man.