A few days ago, this book was finally published. You can find the details about this book, example chapter, and further ordering information on the publisher's site https://www.packtpub.com/irrlicht-1-7-1 ... guide/book
I already have my copy
And I must admit that I found some very interesting parts there. So it's not just a beginner's book, although it focuses on the most frequently used stuff of course. Anyway, enough advertising here. Just one more thing: You can also order via amazon, and the Kindle version is even cheaper than the ebook on the publisher's site.