Chasing the Tiger — Jane Wilson-Howarth

How could everything have gone so horribly wrong? It is all down to 16-year-old Alex, his 12-year old brother James, and their feisty friend Bim. Armed thugs have captured the boys' parents and are taking them to a hideout high in the Himalayas. It seems only the three children have any chance of rescuing the adults from ruthless terrorists who want to publicise their cause by threatening these innocent wildlife researchers.
But to get the parents free, the children have to cross two high mountain passes and flee from hungry predators.
Can they catch up in time?