Dangerous Days 4 - Enemies Within. Dangerous Days, #4

Emily's father, Sir Nigel, is so grateful for Emily's rescue from the terrorists who abducted her that he invites Wesley, Graham and Scott to go to England with Emily as his guests. Only Wesley and Graham can travel after a serious injury to Scott the day before departure. Wesley, though, also has an extra personal reason for going. He wants to know how the terrorists were able to Emily to the Australian outback so easily.
From an exclusive private boarding school in the English countryside, through the labyrinth of London's underground railway, to the city's seedy East End, and finally into the very corridors of government in Whitehall, they follow the trail of mystery. But what they discover is an appalling, long-forgotten act of cruelty, a murder plot, a betrayal of friendship, and an obsession for vengeance in a world of power, privilege and affluence.
This final event also means an end to the danger that Wesley and his friends have faced, and confirms in Wesley's mind his destiny to become a photo-journalist.