"Connexive Logic in the Middle Ages" offers an in-depth analysis of connexive logic, a modern branch of logic based on the belief that no statement can imply its own negation. This idea, which dates back to Aristotle, is explored through the examination of the theories of significant medieval logicians such as Boethius, Abelard, and Buridan. The book highlights how these thinkers interpreted the conditions for implications and their validity in various contexts. It demonstrates that connexive principles do not hold in certain cases, particularly with impossible antecedents or necessary consequences. Wolfgang Lenzen, an experienced philosopher and author of numerous works, guides readers through the complex history of logic in the Middle Ages, providing valuable insights into the development of philosophical thought.