I finished reading the JavaFX Script book by James Weaver a couple of days ago. I ordered this book from Amazon last November, and it just arrived last month. I have to say that I was getting a bit impatient about the delay, but it really was worth the wait.
If you are new to JavaFX like me, then you will find this to be an excellent starting point. The book is really geared towards developers who are interested in authoring small Swing-like applications. I'd have to say that it helped to have a good background in Swing prior to reading this book...but I think that anyone could pick it up and just start from scratch. James does a great job from start to finish as he builds upon concepts as the book goes on. It really is a start-to-finish book, but at 200 pages, that is not very rough to read straight through. It really is a quick read, and quickly jumps into the basics and works up from there. I was also impressed with the example applications used in the book as they gave me a great sense of what the language is capable of doing.
This book is definitely worth the read if you are interested in learning JavaFX basics and beyond.