Ebook: Prototype and script.aculo.us: you never knew JavaScript could do this!

I've had this book for a few weeks now, and I've really liked it. I was put onto a team using Prototype and Scriptaculous, and needed to get up to speed quickly. The author's style makes it easy to read, and I've really learned a lot. I would consider it sort of a beginner/intermediate level book. But since I hadn't been using either library before, that was perfect for me.