Diamand, Emily <br/><br/>
Raiders' Ransom - Book 1. 

 - United Kingdom :  Chicken House,  2009. 
<br/><br/> In 23rd-century Great Britain, where climate change has caused vast flooding, the piratical raiders kidnap the Prime Minister's daughter, and thirteen-year-old Lilly Melkun, an English fisher girl, take her seacat on a daring rescue attempt with a mysterious talking jewel from  a past computer age tucked in her belt as ransom. 
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<br/><br/><label>ISBN: </label>978-0-545-14297-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adventure and adventurers - Fiction<br/>Kidnapping - Fiction