Louisiana State University (LSU) is a research-intensive co-educational institution and the largest public university in the state of Louisiana. In partnership with federal agencies and private businesses, it operates some of the most important research projects in the nation. LSU Libraries supports this research as well as the instructional mission of the university by means of a subject liaison system that incorporates collection development duties. Under the authority of the Collection Development Coordinator, collection development for all schools and departments is assigned to individual librarians. In this chapter, collection development is described generally, with emphasis on monograph selection, and as it pertains to the LSU College of Engineering (COE).