Set off with Wolf Girl and her pack on the thirteenth exhilarating adventure in this million-copy selling series! When Gwen and her pack fall from Castle Winter into the churning sea, she wonders if this might be the end of their adventures... but then they are rescued by an unlikely group - a boy, a girl and two dolphins. Together the new alliance sets out to Rocky Bay to search for their lost families and are met by a strange sight - prisoners hauling glowing rocks from the ocean under the watch of Braxan guards. But soon the group are spotted... Will they survive this battle against enemies on sea and land? And might Gwen finally be reunited with her family? From Australia's bestselling author comes this thrilling new tale of survival and friendship featuring Wolf Girl and her fearless pack!