I wasn't altogether sold on a whole volume with a small bunch of the students fighting and sneaking their way up a criminal hotel, with Koro Sensei himself spending the entire time in ultimate defence mode (which is to say, basically as a bowling ball, unable to do more than offer counsel). But little touches like the parodic elite killers the kids face (especially the obsessive gun-taster) make it work, and there's a fabulously loathable final boss behind the bioweapon attack. In amongst the familiar exhortations - it's not failure that matters, but how you respond to it! - one chapter is devoted to an advisory against spliffs so sincere that no Western comic would have dared publish it in the last thirty years. Also, apparently walking by moving the arm and leg on the same side at the same time is a useful technique for assassins, so that's reefer madness plus ninja Madness.