Since nobody has reviewed this book so far, I thought I'd offer a note about it. “Lectures on Negative Dialectics” primarily contains material from the last of four courses Adorno taught before publishing his important late work, “Negative Dialectics.” The main text includes a series of chapters which combine edited transcriptions of Adorno's lectures with his original lecture notes. The book also includes a great short introduction to the concept of negative dialectics written by the book's editor, Rolf Tiedemann, and as an Appendix, a 30-page or so long text that looks to me like a draft version of the Introduction to the final book.
One important note about the material from the lecture course: only the first ten lectures were recorded, so no transcripts are available for lectures 11-25. The lecture notes for all of the classes do survive and are included. One limitation of this is that his notes tend to be simple and short, at times comprised of simple phrases or reminders to mention a particular text. For this reason, the notes tend to be a tad thin without the transcripts. Obviously, this isn't something that can be fixed, but it's still a bummer.
In terms of philosophical content, the book is pretty stunning. Adorno was a wonderful lecturer who brought both rigorous philosophical work and a concern for clarity into the classroom. At times, he spends significant time responding to students' questions or objections, which is immensely useful for simplifying his often complex thoughts. Anyone interested in Adorno will also find reading his lectures delightful just in terms of the somewhat different view they give of Adorno: in front of the classroom, he is far more sentimental and personable than the uncompromising intellectual who comes through in his published texts.
Certainly though, what is most exciting about this book is its germinal relationship to the final text of Negative Dialectics. During classes, Adorno often tries out arguments that later surface in implicit or explicit form in the published text. At other times, he focuses on aspects that get less attention in the last text. In this sense, it's a must-have accompaniment to readings and re-readings of Adorno's thought.
In the end, this is a nifty book that offers a number of things to readers. It's especially invaluable if you are considering working your way through Negative Dialectics for the first time – No line-by-line commentary exists that I know of, so this is probably as good at it gets for now. Reading a few lectures before digging into the text will go a long way towards getting you situated with some of the things Adorno is trying to do with negative dialectics. But there are number of ways to read it, so I'd recommend it for pretty much anyone interested in Adorno's thought.