- Monks in medieval times were the sole creators of illuminated manuscripts and copied books mainly for religious use in monasteries. - The process involved a monk traveling to borrow a book, copying it by hand in a scriptorium, and sometimes illuminating the text with decorations. - By the 12th century, book production expanded and became a business conducted in cities as demand increased from universities and the middle class. Scribes and illuminators were hired by booksellers to produce commissioned manuscripts.