As I admitted years ago, I long held an unthinking prejudice against Dave Hargrave's Arduin books, a prejudice I still haven't wholly overcome, even if I've made great strides in that regard. Even if, ultimately, Arduin "isn't for me," I have started to appreciate it in its own right and have found that, despite the stolidity of my imagination, little bits of Hargravian has seeped in over the last couple of years.
I own the first three volumes of the Arduin Grimoire series and nothing more. What I'd like to hear -- from fans of Arduin, not its detractors -- is whether there are any subsequent volumes or related products that you think might be helpful to me as I continue my education. Are volumes IV-IX worth owning? What about Hargrave's dungeons? The modern Arduin books by later authors? Let me know what you think.