What did Faust write?

I don't think Faust wrote anything. He was a character created by the
German writer Goethe (I think). His story was made into an opera by
Massanet, entitled "Faust".

Frederick Faust, using the pen name "Max Brand," wrote an amazing
variety of literature:

http://maxbrand-faust.com/history.html

There are many other authors named 'Faust'. If you'd tell us more
about what you need, you'll be more likely to get a good answer.

Gounod wrote the opera "Faust," and the character Faust (Dr. Faustus)
was around in folktales for a couple of centuries before Goethe wrote
his drama.

Apteryx

Faust is a common German name; no doubt, there are many authors with
that name. Literally, it means "fist," but it is understood to mean a
freed man, i.e., one who has the right to raise his hand to take an
oath or vote.