is this a primary of secondary According to John Kinnamos, a Byzantine historian,

Question

saw the Seljuk Turks invade the Byzantine Empire. In
his history book, he said that the Byzantine Empire
was very scared when this happened, like a big storm
suddenly hitting them from the North. Kinnamos also
talked about how the Seljuks destroyed everything by
stealing and damaging the cities and countryside.
They even killed and hurt both important people and
regular people.

Answer 1

The passage you provided is a secondary source. It is a statement made by John Kinnamos, a Byzantine historian, who is relaying information about the Seljuk Turks' invasion of the Byzantine Empire from his history book.