In this book prominent academics and specialised practitioners from the USA and the EU offer a comprehensive review on the issue of secondary liability for copyright infringement, particularly P2P file sharing and online infringements. Some contributions analyse the relevant case law on third-party liability and their implications for the future. The decisions on P2P also involve issues of international law and data protection. Other more forward-looking contributions provide original insight into the future shape of copyright in the online world, for instance whether it could or even should evolve towards a compensation system. By combining these avenues, the book will be of particular interest to practitioners and legal scholars.