This is a series of four fiction books, plus an accompanying art and origami book called Art2-D2.
I bought the first one for DS (immature 9 yo), I think it was recommended on a thread on MN, and he read it almost without putting it down. Then he made an origami Yoda, then he made an origami Yoda for every boy in his class. And while he was making all these Yodas he was asking for all the rest of the books in the series.
When the rest of the books arrived he read all of them (I did try to ration them, but it didn't work) and then he did all the drawing in the Art2-D2 book.
The only bad thing I can think to say about them is that it's probably too short a series. I think DS would have kept reading if there had been more.