In 2010, Indiana University Press, Kent State University Press and Temple University Press received a Mellon grant to create a new series of books on Ethnomusicology by new authors called Ethnomusicology Multimedia. One of the key features of this new series of books is that discussion and content in the book will be linked to multimedia on the web so that readers will be able to see or hear the specific songs, dances, ceremonies, etc. that are being discussed in the books by linking to a web site and playing back video, audio or images related. To help the editors, authors and the presses work with and maintain this web site, the development staff at the Institute for Digital Arts and Humanities, are developing an online tool that will allow editors and authors to segment and annotate uploaded video, audio and image files and then provide the necessary information to link those annotated segments to references in the published books. But beyond assisting authors and editors, this new online tool will also assist the presses in determining the content to move to the web site so that readers will have access to the multimedia materials associated with a given book. In essence, like a content management system, the online tool will be a Annotation Management System, allowing the presses to copyedit, review and publish multimedia materials to the readers' web site to provide additional resources for the published book. I will discuss the process of designing and building the Online tool and demo a prototype that we have developed for the project.