This book investigates the core logical doctrines of Ramon Llull to determine how his idiosyncratic methods functioned within the broader context of medieval scholasticism. Mark D. Johnston, a scholar of medieval philosophy, utilizes a rigorous analytical framework to examine Llull's primary texts. He argues that Llull's logical system is not a deviation from scholasticism, but rather a deliberate reinterpretation of common scholastic teachings aligned with his specific ethical and spiritual objectives.

Experts recognize this work as a significant contribution to the field, as it provides the first book-length treatment of Llull's philosophy in English in over half a century. Scholars frequently note the clarity with which Johnston navigates the dense and often misunderstood logical framework of the Catalan philosopher.