The Last Light of the Sun is set in the same world as Kay's The Lions of Al-Rassan and The Sarantine Mosaic novels, taking place after the Sarantine Mosaic but before Lions. A passing reference to the mosaic Crispin created at the end of The Sarantine Mosaic and to the works of Rustem implies that decades or perhaps centuries have passed, and a conversation about Leontes' time on the throne puts this book roughly three hundred years after the Sarantine Mosaic. Asharite merchants from Al-Rassan put this book chronologically either before or during the events of Lions of Al-Rassan. The books main themes are revenge, violence, the passing of an era, clash of cultures, and love — especially between father and son.