“The “MOOCs and Libraries: Massive Opportunity or Overwhelming Challenge?” event took place 18-19 March at the University of Pennsylvania and was broadcast live online. Hosted by OCLC Research and University of Pennsylvania Libraries, the event featured thoughtful and provocative presentations about how libraries are already getting involved with MOOCs, and engaged attendees in discussions about strategic opportunities and challenges going forward. OCLC Research Senior Program Officer Merrilee Proffitt organized the event and has posted a series of six blog posts on the OCLC Research blog, Hangingtogether, that recap presentation highlights and summarize its outcomes.”