Stormchild — Bernard Cornwell

The last time Tim Blackburn saw his headstrong daughter Nicole, she was sailing out of his English Channel boatyard with the oddly charismatic leader of a group of environmental activists--some might say terrorists--called Genesis. Now, alone after the deaths of both his beloved wife and his son, Tim becomes obsessed with salvaging what is left of his family by finding his daughter.

Instead, what he finds is that Nicole may be more a prisoner than a member of this group that exerts a sinister control over its followers. Together with an American journalist who wants the inside story on Genesis, Tim sets sail to rescue Nicole, a quest that ends on the hellish coast of Patagonia. There, in the primitive Genesis settlement, nightmarish danger is waiting for Tim Blackburn ...as are disturbing truths that will haunt him forever.