Islamic books from A.D. 900 to 1500 reflect major changes from the past and important innovations. A. Books became major vehicle of artistic expression for calligraphers and painters, and the subjects of books expanded to include more and more kinds of works. B. The growing luxuriousness of books meant that the market for them was increasingly dominated by the wealthy and powerful patrons who could afford them. C. After it was learned from Chinese prisoners, the technique of papermaking spread throughout Islamic lands, where paper gradually replaced parchment. D. The high status enjoyed by calligraphers and artists made books extremely popular in the cities where books were bought and sold. E. The popularity of books led to major advances in the development and transfer of new artistic ideas. F. Around the year 900, a set of rounded styles of Arabic handwriting began replacing angular scripts in copying the manuscripts of the Koran.