Among the Barons (Shadow Children Series #4)

As a third child in a society that allows only two children per family, Luke Garner has been in hiding for most of his life. Now he has the freedom of a false identity, and he's finally settling into his new life as Lee Grant, a Baron (a member of the highest class of society). All that may change now, though, for the Grants have decided that Lee's younger brother, Smits, should join Luke at boarding school. Smits arrives with his hulking bodyguard, and each of them reveals in confidence that the other is a threat. Things become even more complicated for Luke when the Grants decide that both boys should return home, and Luke discovers that living among the Barons might be deadlier than he ever imagined.