Rational Homotopy Theory and Differential Forms (2013) by Phillip Griffiths, Professor Emeritus in the School of Mathematics, and John Morgan, has been published by Springer New York. This revised and corrected version of the well-known Florence notes, circulated by the authors together with E. Friedlander, examines basic topology, emphasizing homotopy theory. Included is a discussion of Postnikov towers and rational homotopy theory, followed by an in-depth look at differential forms and de Tham’s theorem on simplical complexes. With its modern approach and timely revisions, edition is a valuable resource for graduate students and researchers in algebraic topology, differential forms, and homotopy theory.