The first part of this article assesses modern scholarship on the history of the Jews of Yemen in light of Arabic sources written by Yemeni Muslim scholars. Since accounts of this history have largely neglected this rich vein of material and, indeed, seldom consulted more than a few Yemeni Jewish sources, it is here argued that the reconstruction of the history of the Jews of Yemen—as well as the larger history of the Jews under Islam—will remain inconclusive unless adequate use is made of Arabic Muslim sources. The second part of the article questions the notion, prevalent in modern scholarship on Jewish thought under Islam, that Muslims were oblivious to developments in Jewish literature, philosophy and religious discourse. Evidence from Yemeni Muslim literature reflects a high level of interest in, and use of, concepts found in Jewish religious thought and presupposes genuine Muslim intellectual curiosity in the subject. Furthermore, the evidence at hand reflects a higher level of cultural integration between the Jews and Muslims of Yemen than is usually recognized in modern studies.