Which Luminous arc 2 art book is this from? It certainly doesn't look like it's from the one that came as a pre-order bonus.

I believe it's the Japanese artbook, due to the obvious text everywhere. I'd like to get my hands on it at some point..

same here, i'd like to see some of the extra artwork especially some of the female characters in their bikinis like this in the least.

why is it tagged as error?

don't know until a suitable answer is given i guess it's safe to remove it.