Tsubasa Character Guide 2 Book

Seeing how this volume is only about volume 8 through 14, if I recall correctly, most of the information is pretty well-known if you've read the entire series. About one-third is recapture of what has happened in said volumes. However, it had some interesting sections; there's an interview, concept art, the art process from script to drawings and a short quiz (according to which I'm Mokona and my world of choice would be Recort, the magic world with flying horses and stuff - I approve). I especially liked the sketches near the end, setting up some kind of animated video for the intro song of the anime, which looked especially awesome.
Oh, and it has colour art in the beginning, which is always a very good feature with anything CLAMP. The art is just so lovely.

Overall, it's a nice addition to the series, but a lot of the information is pretty superfluous for the fan who's read the whole series and an interview or two before.