You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
In OTL the printing press didn't catch on in the Islamic world until well into the 19th century which likely proved disastrous to development in that part of the world as the societies that had developed the printing press tended to have higher literacy rates. With a POD no later than 1750 have printing presses be widespread in the Islamic world.