The Guide for the Perplexed
The best known practitioner of Jewish Kalam was Saadia Gaon, and Jewish Kalam represented the philosophical battlefield upon which Saadia attacked the proponents of Karaite Judaism. Maimonides in his "The Guide for the Perplexed" frequently references and disputes positions of Kalam, both Jewish and Muslim, and in general conveys an opinion of Kalam that is highly uncomplimentary. Judah Halevi also makes reference to Jewish followers of the Kalam, but mentions only Karaite Jews.