Reddit mentions of Classical Arabic Philosophy: An Anthology of Sources

For medieval Islamic philosophy, you might consider Classical Arabic Philosophy: An Anthology of Sources.

The introduction gives a solid history of Islamic philosophy written in Arabic, and it contains many good translations. One important thing to remember when studying Islamic philosophy (and especially the thinkers in this anthology) is that the Islamic philosophers were heavily influenced by Aristotle. Much of their thinking and writing engaged and influenced the various major Christian European and Jewish traditions of philosophy. As such, classical Islamic philosophy is sometimes considered part of the Western canon.