- Africa World Press and Red Sea Press
 - Lawrenceville - Sister presses publishing books about Africa, African-Americans, and the African diaspora. - Blease Research
- Easton - Publisher of the Full Disclosure series, independent life insurance policy competitive analysis and comparison.
- Camino Books
- Philadelphia - Publishes nonfiction books of regional interest to the people of the Middle Atlantic states.
- Chelsea House Publishers
- Broomall - Non-fiction library books for children and young adults.
- Communications Media for Education, Inc.
- Princeton Junction - Providing medical communications and information services for physicians and other healthcare professionals under pharmaceutical industry support.
- Current Medicine Inc.
- Philadelphia - Publisher of illustrated, full-colour medical publications.
- Exeter House Books
- Reading - Offering true ghost stories, shipwrecks, train wrecks, hauntings, folklore, and legends in Pennsylvania, New Jersey, New York, and Delaware.
- F.A. Davis Publishing Company
- Philadelphia - Specialises in publishing textbooks, clinical reference books, monographs and multimedia in the fields of nursing, allied health, and medicine.
- Family Business Magazine
- Philadelphia - For the owners of family companies and the advisors who serve them.
- Gauntlet Press
- Springfield - Publisher of critically acclaimed original horror fiction and limited edition reprints of horror classics.
- Handbooks in Health Care Co.
- Newtown - Medical publishing company that produces education and reference materials useful for clinicians, residents, and students preparing for board examinations.
- Jewish Publication Society
- Philadelphia - Publisher of Jewish books in the English language.
- Lippincott Williams & Wilkins
- Philadelphia - Global publisher of medical, nursing, and allied health information resources in book, journal, newsletter, looseleaf, and electronic media formats.
- Marco Products, Inc.
- Warminster - Publisher specialising in elementary and secondary guidance related programmes, games, and books.
- Meniscus Limited
- Bala Cynwyd - Publisher of educational activities and communications vehicles for health care professionals.
- Neibauer Press
- Warminster - Providing tithing and stewardship tracts and programmes, banners, and more for churches.
- Oak Knoll Books
- New Castle - Specialises in out-of-print books about book collecting, book history and the book arts; publisher, distributor, and bookseller.
- Pearl Publishing House
- Philadelphia - Publisher of Islamic books and educational software.
- Peterson's Education Center
- Princeton - Provider of information on US-accredited educational institutions. Also publishes college guides and college and university entrance test prep materials.
- Salem Company
- Woodstown - Publishes self-study textbooks for the beginning basics of industrial gearing and machinery.
- Sweatshop Press
- Philadelphia - Publishing house under which The Jamar Chronicles is produced.
- Swedenborg Foundation and Chrysalis Books
- West Chester - Publisher, bookseller, and educational organisation offering the theological works of Emanuel Swedenborg and more.
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