The Highlander (The Rise of the Aztecs #1)
Zoe Saadia

Yet, Texcoco, the mighty Capital of the Lowlands, seemed incredibly beautiful, sparkling, its pyramids magnificent. A friendship with the Lowlander boy, the First Son of the Texcoco Emperor, seemed harmless in the beginning. They were just boys, and their clandestine meetings were always fun, providing great entertainment.
However, on the day Kuini agrees to finally enter the magnificent city, it would all change. He expected to get into trouble, but he could not foresee the extent of the trouble and, worst of all, he did not expect to uncover hidden secrets concerning his own family.