The Ambassador's Mission (Traitor Spy Trilogy, Book 1) : Sonea, a Black Magician of Kyralia, is horrified when her son, Lorkin, volunteers to assist the new Guild Ambassador to Sachaka. When word comes that Lorkin has gone missing, Sonea is desperate to find him, but if she leaves the city she will be exiled forever. And besides, an old friend is in need of her help. Most of her friend's family has been murdered - the latest in a long line of assassinations to plague the leading Thieves of the city. There has always been rivalry, but now the Thieves are waging a deadly underworld war, and it appears they have been doing so with magical assistance.