Fiction or non?

The name for a person who writes non-fiction is a non-fiction author or writer.

David Baldacci attended Virginia Commonwealth University and the University of Virginia. He achieved a B.A. in English and a law degree before going on to become a popular writer of fiction.

David Foster Wallace was an writer and novelist, born in Champaign, Illinois, in the United States of America. David wrote 3 novels, 3 short story collections, and 9 non-fiction collections.

Gladwell is a/an Non-fiction writer, journalist, public speaker