Contributor biographical information for The period book : everything you don't want to ask (but need to know) / by Karen Gravelle & Jennifer Gravelle ; illustrations by Debbie Palen.
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Karen Gravelle co-wrote Walker and Company's Where Are My Birth Parents? and is the author of several other books about difficult issues facing today's adolescents. She lives in New York City.
Jennifer Gravelle attends Falls Church High School in Virginia.
Debbie Palen is a professional artist from Cleveland, Ohio. She illustrated Walker and Company's Keep the Buttered Side Up.
Library of Congress subject headings for this publication:
Menstruation -- Juvenile literature.