Via The Ancient World Online, word that the Oriental Institute of the University of Chicago's efforts to make older, out-of-print scholarly publications of the Institute available free online continue, with several important works on the Islamic period by the late Nabia Abbott. These include all three volumes of her Studies in Arabic Literary Papryi (Vol. I, Vol. II, Vol. III); also her "The Rise of the North Arabic Script and Its Kur'anic Development, with a Full Description of the Kur'an Manuscripts in the Oriental Institute."
These are classic works of early Islamic literary scholarship and not for everyone, but for those interested, it's great to know they are readily available.