"The book is a splendid combination of systemic acuity and historical scholarship and provides a much-needed correction to some of the historical injustices of our time. It will be a welcome corrective to current neglect of Baroque philosophy." -- -Nicholas Rescher University of Pittsburgh "Novotny's book is a great work of scholarship and philosophical analysis. It is an ambitious study of the seventeenth-century history of one of the most disputed and controversial concepts in philosophy: the notion of "being of reason" (ens rationis), which is generally contrasted with the notion of "real being" (ens reale). It breaks new ground in the study of an important period in the history of philosophy and is a must read for anyone interested in scholastic philosophy in particular or metaphysics in general." -- -Jorge Gracia University at Buffalo, SUNY "This volume by Novonty attempts to vindicate Baroque scholasticism by focusing on the debate surrounding ens rationsis (intentional beings/ beings of reason) .. . Highly recommended." -Choice