The publication of Section IX signifies the completion of the Critical Edition of Friedrich Nietzsche's Complete Works. The texts Nietzsche wrote into his notebooks and exercise books from 1885 to 1889 are now to be published in their entirety, including other notes from his last creative period found in older notebooks or notes now collected in folders.

For the first time a complete and edited documentation of Nietzsche's unpublished material will be presented in a manner which preserves its typical note-like character. The publication of the manuscripts from 1885 to 1889 will provide Nietzsche scholars with a reliable and clear basis for interpretation, and the connections in the author's thought, writing and works will become visible. Each volume also contains a CD-ROM, which provides the representations of the unpublished manuscript facsimiles. Furthermore, the CD-ROM includes the critical supplements in their current state.