 In 1975 Salmon published a second book called Space, Time and Motion: A Philosophical Introduction (1975a) which contains a masterly introduction to the topic. The four chapters of the book lead the non-specialist reader through the essentials of the philosophy of space and time from non-Euclidean geometries and Zeno’s paradoxes to special relativity and simultaneity. The book, which presupposes only an elementary background knowledge of geometry and mathematics on the part of the reader, is meant as an invitation to pursue the topics addressed in a more systematic and specialized way. Salmon fully achieved this purpose, whose treatment of thorny subjects succeeded in being both “scientifically sound” and “intuitive and easy” (Salmon 1988c: 276).