O'Brien, Robert C
Chronological Checklist
- The Silver Crown (New York: Atheneum, 1968)
- Mrs Frisby and the Rats of NIMH (New York: Atheneum, 1971)
- A Report from Group 17 (New York: Atheneum, 1972)
- The Silver Crown (London: Victor Gollancz, 1973)
- Z for Zachariah (London: Victor Gollancz, 1975)
- The Secret of NIMH (New York: Scholastic, 1982)
- The Silver Crown (New York: Collier, 1988)