Board Thread:News and Announcements/@comment-119.95.67.79-20140609102602/@comment-5131141-20140614163306

Looking at the catalogue page of the con, it's basically what mothy will sell there (OSS Act 1 and 2 and the new album, titled The Muzzle of Nemesis, for now). There's no mention for booklets because of the format of the page (apparently meant for Doujins, not music), It only includes, price, genre, number of pages (set to one in all the albums, so it has nothing to do with the Booklet) and release date.

As for 長壁 that's a tough one. 長 means long, head or variations of "To lead", I go more for the latter while 壁 means wall or fence. There's also a Youkai Called 長壁姫 (Osakabe Hime), who haunts a castle keep, but I don't think it's a reference to that monster :/