The one tool you don't want to skimp on when equipping a kitchen is a knife. A high-quality sharp blade can make cooking and food prep considerably more enjoyable, but so can a set of novelty kitchen knives that look like sheathed miniature samurai swords.
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.