Twitter. Facebook. These names stir up feelings, opinions, and experiences in just about everyone. As these services rise in popularity, libraries have begun to use them to reach out to patrons. Some libraries use Twitter but not Facebook. Some use Facebook but not Twitter. Some use both Facebook and Twitter, while others use neither. Yes, the popularity of these social networking services does warrant implementation as a way to reach patrons. But, as the author had always preferred using Facebook, was there room for Twitter at the table? As he struggled with this issue, many questions occupied his thoughts when discussing libraries and social networking. Should a library choose one over the other? What are the major differences, if any? Does one service have greater value or return on your investment? Was there an easy way to do both? In May 2010, Illinois' Fremont Public Library, where author Curt Tagtmeier is a reference librarian, began a project that started a Facebook page and a Twitter profile to take advantage of the popularity of social networking. This article will seek to answer the question of whether a library should choose Facebook or Twitter in a battle of the social network stars.