Claim: Game of Thrones (season 1) is based on a fantasy book.
Evidence: The series is based on A Game of Thrones , the first novel in the A Song of Ice and Fire series by George R. R. Martin , adapted for television by David Benioff and D. B. Weiss.
A Game of Thrones is the first novel in A Song of Ice and Fire , a series of fantasy novels by American author George R. R. Martin.