This fourth volume includes 743 entries listing books, articles, and chapters in books published between 2000 and 2004 that concern various aspects of the Carpatho-Rusyns wherever they may live. Each entry includes full bibliographical data, followed by extended annotation. Journals that focus on Carpatho-Rusyn studies are listed serparatley and include content analysis in the annotation. Materials listed include a wide variety of subject areas inthe humanities, social sciences, and the arts, among the most important of which are history, language, religious studies, literature, ethnography, and folklore, the national identity question, Carpatho-Rusyn diasporas, historiography and scholarship, education, and book publishing and the press.