QU
Quintilian
Marcus Fabius Quintilianus was a Roman educator and rhetorician born in Hispania, widely referred to in medieval schools of rhetoric and in Renaissance writing. In English translation, he is usually referred to as Quintilian, although the alternate spellings of Quintillian and Quinctilian are occasionally seen, the latter in older texts.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

The Institutio Oratoria of Quintilian
1976
ISBN 9780434991259
M. Fabii Quintiliani Institutionis oratoriae
1997
ISBN 9788472993839