Which fantasy series features a land called Westeros?

The fantasy series featuring the land of Westeros is A Song of Ice and Fire.

George R. R. Martin's high-fantasy novel series is set largely in Westeros, a continent divided among powerful noble houses and kingdoms. Its first volume, A Game of Thrones, was published in 1996. The story begins with a struggle for the Iron Throne but expands into conflicts involving dynastic politics, ancient magic, dragons, and the supernatural threat beyond the Wall.

Westeros was formerly ruled for nearly three centuries by the Targaryen dynasty, whose power was closely tied to dragons. Robert Baratheon's rebellion ended Targaryen rule before the opening novel. The series is known for multiple points of view, shifting alliances, and the unpredictability of its long summers and winters.

A Song of Ice and Fire is the book series; Game of Thrones is the title of its first novel and the television adaptation's name. The released novels currently number five, with two further planned volumes titled The Winds of Winter and A Dream of Spring.