A somewhat formal term for a person who writes books or articles, often with a scholarly or serious tone. More literary than 作家 (さっか).
彼は歴史に関する著述家として知られている。
He is known as a writer on historical subjects.
Compound of 著述 (ちょじゅつ, 'writing' or 'authorship') and 家 (か, 'person' or 'specialist').