Secret Son by Laila Lalami
Youssef el-Mekki, a young man of nineteen, is living with his mother in the slums of Casablanca when he discovers that the father he believed to be dead is, in fact, alive and eager to befriend and support him. Leaving his mother behind, Youssef assumes a life he could only dream of: a famous and influential father, his own penthouse apartment, and all the luxuries associated with his new status. His future appears assured until an abrupt reversal of fortune sends him back to the streets and his childhood friends, where a fringe Islamic group, known simply as the Party, has set up its headquarters.