Samurais are a resourceful bunch, roaming the country looking for freelance work. So it's no surprise they've come up with a really simple way to keep books on a shelf from falling over: just stab them all through the heart with a sword. Or at least we're assuming that's how this Katana Bookend from Mustard works.
It could also be just two halves of a fake sword attached to heavy faux books that sit on either side — and blend in — with your own collection. But the first explanation is probably the more enjoyable way to describe it to your friends in May when you can pick one up for $US30, shelf and other books not included. [Mustard via bookofjoe]