This book is a collection of recent essays offering fresh perspectives on the scope and future of intellectual property rights. The tripartite division of the book is designed to make this inter-disciplinary topic more accessible and intelligible to readers of diverse backgrounds. Part I consists of a single essay that provides a broad overview of the main themes in intellectual property scholarship, such as normative intellectual property theory and the legal infrastructure for property protection. The second section of the book presents several essays that are intended to deepen the reader's understanding of intellectual property theory and show how it can help us to grapple with the proper allocation of property rights in cyberspace. And the final section further develops the themes in Part II but in greater detail and with a more practical orientation. While intellectual property rights create dynamic incentive effects, they also entail social costs, and they are sometimes in tension with the development of a robust public domain.