Premise: A Storm of Swords is the third of seven planned novels in A Song of Ice and Fire , a fantasy series by American author George R. R. Martin . Tyrion Lannister . Introduced in 1996 's A Game of Thrones , Tyrion is a dwarf and member of House Lannister , one of the wealthiest and most powerful families in the fictional kingdom of Westeros . Tyrion was one of a few prominent characters that were not included in 2005 's A Feast for Crows , but returned in the next novel A Dance with Dragons ( 2011 ) .
Hypothesis: Tyrion Lannister appears in 2 or more novels.
Label: ENTAILMENT