Page "World of A Song of Ice and Fire" Paragraph 1

One of the most visible traits of this fictional world is that the seasons do not pass once per year.

Summer and winter can both last many years, and the duration of both can be difficult to predict.

The nature and existence of magic is a subject of debate among the characters in this series, with many individuals declining to believe in it.

However, as the books progress, it becomes clear that magic does exist in this world ( or used to ) and is slowly returning.