Joseph Citron, Ph.D. (University College London, 2019), completed his doctorate in 2019 and is an associate fellow of UCL. This monograph is the result of five years of research on Isaiah Horowitz.

In this book, Citron analyses Isaiah Horowitz's highly influential opus of ethical literature, the Shnei Luhot Ha-Berit. He demonstrates how Horowitz constructed a pioneering interconnected religious system based upon the principles of Kabbalah, emphasising the importance of joy, passion and self-transformation.