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  === ''A Clash of Kings'' ===
  Frustrated with Cersei's many political blunders as well as her failure to control Joffrey, Tywin appoints Tyrion Hand of the King, with explicit instructions to control Cersei and Joffrey. Once at the capital, Tyrion enters into a bitter power struggle with Cersei, subverting her authority and removing her supporters from positions of power.
  In Jaime's absence, Cersei begins taking other lovers, including their cousin Lancel Lannister. When Stannis Baratheon sails on King's Landing, Cersei and Joffrey hide in a tower, leaving Tyrion to mastermind the defense of the city. Ultimately, Tywin arrives in time to force Stannis to retreat and save the city.