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An Acceptable Time (Madeleine L'Engle's Time Quintet) (original 1989; edition 2007)
Amazon.com Product Description (ISBN 0440208149, Mass Market Paperback)Polly's visit to her grandparents in Connecticut becomes an extraordinary experience as she encounters old friends and mysterious stangers and finds herself traveling back in time to play a crucial role in a prehistoric confrontation.
(retrieved from Amazon Thu, 14 Apr 2011 12:33:25 -0400)
Polly O'Keefe goes to spend a quiet visit with her grandparents. She meets several unusual people, who lead her on a trip back through time, where she discovers the importance of love in human relationships.
(summary from another edition)
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