Haddix, Margaret Peterson. Among the Barons

Haddix, Margaret Peterson. Among the Barons [#4] Aladdin, 2003 [0-689-83910-3]
In book four of the series we return to Hendricks School for boys where all the students have false identities. They are third children in a world where families are only allowed to have no more than two children. One day Luke's brother shows up (the brother of his false identity) and he is brought to this very wealthy home where is fake brother is traumatized by the situation of the death of his real brother with the carrying on of his life with an impostor. At the home Luke gets tangled in webs that both the parents and the underground are weaving. I enjoyed this 182 page book the best in the series. Of course this is another one after this 4th one.