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Seforim in Judeo-Arabic Gaonim & Rishonim

Rav Saadia Gaon’s Emunoth ve-Deoth, his Tafsir (Tanach commentary and translation), and his siddur Rav Solomon ibn Gabirol’s Tikkun Middot ha-Nefesh

Rabeinu Bahya ibn Pakuda’s Chovot ha-Levavot

Rav Judah Halevi’s Kuzari

RAMBAM’s Commentary on the Mishnah, Sefer ha-Mitzvot, Guide to the Perplexed, and many of his letters and shorter essays.