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The Secrets of the Rock [With Reproducible Library Lessons] is written by Phyllis J. Perry and published by Demco (Highsmith). It's available with International Standard Book Number or ISBN identification 1932146245 (ISBN 10) and 9781932146240 (ISBN 13).
When Fribble and his friend Scamper find a rock with an inscription on it, they go to the library to find out what it means.