- ISBN: 9780060818548 (pbk.)
- Physical Description: 328pages. ; 20cm
- Edition: 1st Harper Trophy ed.
- Publisher: New York : HarperTrophy, 2008, c2005.
|General Note:|| Originally published: London : HarperCollins Children's Books, 2005.
|Summary, etc.:|| As they search for their missing father near their Cornwall home, Sapphy and her brother Conor learn about their family's connection to the domains of air and of water.
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|Subject:||Mermaids > Juvenile fiction.
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