This document discusses Second Life, a virtual world platform, and examples of library involvement in Second Life. It begins with an overview of what Second Life is and key facts about its users. Examples are then provided of different types of libraries, educational institutions, and organizations that have a presence in Second Life. These include information islands, academic libraries, and spaces for discussing social and health issues. The document concludes by suggesting reasons for libraries and librarians to become involved in Second Life, such as opportunities for collaboration, learning new skills, and engaging with users.