The unique way in which an author puts thoughts into words is called his or her .?

The unique way in which an author puts thoughts into words is called their style.

Here are some other terms that relate to an author's style:

* Voice: The author's individual personality or perspective that comes through in their writing.

* Diction: The author's choice of words.

* Syntax: The author's sentence structure.

* Figurative language: The author's use of metaphors, similes, and other literary devices.

* Tone: The author's attitude towards their subject matter.