Edwidge Danticat herself suggests books by other Haitian or Haitian diaspora writers in an interview in the back of this book. Her recommendations include Love, Anger, Madness by Marie Vieux-Chauvet and Memoir of an Amnesiac by Jan J. Dominique.
Consider also other books about immigrants in America, such as Americanized: A Rebel Without a Green Card by Sara Saedi, about an Iranian immigrant, or American Street by Ibi Zoboi, which is also about Haitian immigrants. Love, Hate, and Other Filters by Samira Ahmed explores an American-born Indian girl stuck between cultures.
Edwidge Danticat's other works can also be considered, such as Krik? Krak!, The Dew Breaker, and Brother, I'm Dying....