Red Rock 

The ice caps have melted. The coastal areas we once knew are gone, and only 'scavvers' now live in the flooded towns. The world has changed, but as 14-year-old Danni Rushton soon discovers, it isn't the first time...Living with her uncle after the tragic death of her parents, Danni's world is turned upside down when her aunt is assassinated. With her dying breath, she entrusts Danni with a strange, small rock. Danni must not tell a soul that she has it. But what is the rock for, and to what lengths must Danni go to keep it safe? This action-packed adventure takes the reader from the barren terrain of Greenland, to the flooded ruins of Cambridge, and on to a sinister monastery in Malta. In her effort to save her uncle and evade a power-hungry space agency, Danni discovers that friends aren't always what they seem, and a rock isn't always just a rock ...