What a beautiful collection of art. I bought it preowned and it was in excellent condition.
There are two artbooks in the box. The thicker one (with Saito and Okita on the cover) consists of all the art done for the both main video game and the prequel. From character sheets, chibis, backgrounds to all (and I mean all) painted scenes in these two games. The slimmer one (with Hijikata and Kazama on the cover) consists of all of the promotional illustrations, cover art for the games, novels, manga etc. There are also a couple of interviews in this book so if you know Japanese you will have something to read too.
I love it so much, it was worth every penny!