Interactive Features
- Discussion Forum
 - Click on any highlighted items in tables of contents to see the corresponding section of the book
 - Click on any citation of the 178 numbered musical motifs [#118, for instance] to see the motif's musical notation and hear its mp3 recording
 - Click on any citation of an extract from Ludwig Feuerbach [113F, for instance] or Richard Wagner [455W, for instance] to see the original quotation in chronological context in Appendix II.
 


