Tyrion Lannister is the villain of A Clash of Kings.
Tyrion Lannister ( also referred to as `` the Imp '' or `` the Halfman '' ) is a fictional character in A Song of Ice and Fire , a series of fantasy novels by American author George R. R. Martin , and its television adaptation Game of Thrones . He subsequently appeared in Martin 's A Clash of Kings ( 1998 ) and A Storm of Swords ( 2000 ) .