Founded in 1955, ABC-CLIO is an award-winning publisher of reference titles, academic and general interest books, electronic resources, and books for librarians and other professionals. ABC-CLIO serves the history profession, history teachers, and students and scholars of history with a complete line of award-winning databases, books, and eBooks, along with social studies reference and curriculum resources for middle and high school libraries and classrooms.

Greenwood Press provides high-quality, authoritative reference books and general interest topics across the secondary and higher education curriculum. The imprint's many award-winning titles in the social sciences and humanities range from in-depth multi-volume encyclopedias to more concise handbooks, guides, and even biographies.

Libraries Unlimited (LU) is a leading publisher of books, magazines, and professional development products serving the needs of libraries, librarians, and teachers. Well-known and well-regarded throughout the library community, LU has a tradition of publishing in all areas and topics that represent core competencies of librarians. LU titles are used by librarians during their studies and throughout their professional careers. Considered the market leader in textbooks and bibliographic reference for library science, the imprint embodies the work of renowned and highly-visible authors each regarded as an authority in their respective fields. Through the Teacher Ideas Press Imprint, LU also produces material for teachers that encourages the teacher/librarian partnership and the advancement of literacy.

Since 1949, Praeger has cultivated a distinguished reputation for producing scholarly and professional books in the social sciences and humanities, with special emphasis in modern history, military studies, psychology, business, current events and social issues, international affairs, politics, visual and performing arts, and literature. These books serve the needs of scholars and general readers alike by providing the best of contemporary scholarship to the widest possible audience.

Praeger also includes Praeger Security International (PSI). Interdisciplinary and diverse in political perspective, PSI publishes insightful and timely material on international security, including defense and foreign policy, strategy, regional security, military history, and terrorism. With user accessibility in mind, PSI releases all materials in traditional print and electronic formats.