Book excerpt: During and since the completion of the Apollo 11 landing twenty-five years ago numerous books, studies, reports, and articles have been written about the project. This selective, annotated bibliography discusses primarily those works judged to be most essential for researchers seeking to learn more about the Apollo program's varied history. A thematic arrangement of material concerning the project will, it is hoped, bring clarity and simplicity to such a complex subject. An index concludes this work.