A 12-year-old math whiz accidentally learns the startling facts about her true identity and her role in an important secret experiment.
Editions · 5
Paperback
1981 · Scribner
198 pp · EN
9780684168555
Paperback
1983 · Scholastic, Incorporated
EN
9780590337328
Hardback
1983 · Scholastic Inc.
202 pp · EN
9780590324335
Paperback
1986 · Scholastic Paperbacks
EN
9780590427074
Paperback
1987 · Scholastic
EN
9780590410021
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