The Hand of Osiris
In a continuation of the story begun in The Talisman of Elam, Jason Hunter and his friends are abducted from their school grounds, in full view of everyone. To avert a war that will destroy the Earth, Jason must steal the two remaining talismans and form the Hand of Osiris. Doing so will bring back the mysterious Hathor and ensure peace.
At least, that's what everyone thinks.