This essay outlines the fundamental methodological and empirical advances that the study of Heikhalot literature has experienced during the past 25 years with the aim of encouraging specialists and enabling nonspecialists to approach this complex material with greater precision and shaped by the increasing integration in the humanities of cultural and material histories, resulting in an increased focus on scribal practice and other material conditions that shaped the production and transmission of these texts. Against previous assumptions, recent research has shown Heikhalot literature to be a radically unstable literature. This article will review the research tools (editions, concordances, translations, etc.) that now allow for careful analysis of Heikhalot and related texts. Tracing and heterogeneous nature of the Heikhalot corpus will better enable scholars to pursue the important work of understanding its social and medieval religions. avah mysticism, reception-history, transmission-history.