"writing textbooks" is correct and usable in written English.
You could use this phrase if you were discussing a person's profession, for example: "Mary is a professor at a university and her specialty is writing textbooks."
By the time New Horizons has completed its mission, they will be writing textbooks about it.
She was born in 1791 and is generally credited with being America's first professional woman author, writing textbooks, children's books, travel narratives and, most of all, poetry.
Five years later he joined the faculty at the Kent School in Connecticut, where he taught English while writing textbooks and annotating a series of Shakespeare plays.
A sample grading rubric is provided along with an evaluation of the major public relations writing textbooks and how they cover the various communication tactics used in public relations.
She has been involved in a variety of public history initiatives, from writing textbooks to starting a website that approaches Latin American history through its music.
The panel also says it wants to get rid of Japan's "neighbouring-country clause"—a sort of self-denying ordinance which instructs historians to take into account the sentiments of neighbours (meaning China and South Korea) when writing textbooks.
Elmore Leonard was The Man. Elmore Leonard was also a genius at dialog, character, and human situations, and was a working, writing textbook of same.
"You could write textbooks about it.
He also wrote textbooks on writing and published three collections of one-act plays.
He also wrote textbooks on journalism, including "The Magazine World" (Prentice-Hall).
Paul, a rumpled Scotsman who writes textbooks, arrives at a hotel in the Syrian capital.
