The best commentary on the Baha'i writings I've ever had the pleasure to read. Really excellent. As with any academic book, it gets a little dry here and there, and he engages other scholars in argument/debate, and I know nothing of these other scholars, so it's more academic than some I've seen for a wider audience. It's not something that everyone will enjoy. But I loved it, and it made me go back and read the books he talked about and ponder new meanings of the words.