Zulu HeartZulu Heart is a 2003 alternate history novel by Steven Barnes, a sequel to the 2002 book, Lion's Blood.PlotZulu Heart is set in an alternate world where an Islamic Africa became the dominant world power and Europe remained primitive. It continues the story of a young African nobleman, Kai ibn Jallaleddin ibn Rashid al Kushi, and his former slave, the Irishman Aidan O'Dere.