I picked this up based on the fervor over "OMG The Hunger Games so totally ripped this off." And for the first half of this book, I agreed: I thought I knew exactly where BR was going, and how it would get there. It's the story of 40 teens who are instructed to kill each other until only one remains, and are each given a bag containing food, water, and a weapon--some as great as machine guns, others as worthless as forks. Early on some alliances are made, then broken; people are betrayed and killed. 
 But about halfway through, Battle Royale and The Hunger Games part company. By the end, I don't think it's the same story at all. It's a similar story, definitely, but BR's strength is that most of the 40 characters manage to be sympathetic characters. We get backstory on just about all of them, find out who they were before they were thrown int this crazy game, what motivates them to do certain things, and we even see their individual battles against each other. There are a couple of factions we return to multiple times, the ones who are clearly our heroes, but with only one or two exceptions we don't have villains. Hunger Games, everyone who wasn't from District 12 was a villain, someone to be avoided and distrusted, and that was easy because we didn't know who those other characters were. In Battle Royale, we know all these people--they're classmates, some dating back to elementary school. There are histories here, friendships and crushes and romantic entanglements, and that makes the killing that much more horrible. 
 Oh, and for those who thought Hunger Games was a violent book? Whooooooooo boy. This was absolutely horrifying at times. The gunfights were bad enough, but the graphic descriptions of hand-to-hand combat were particularly brutal. It's not the violence that's gratuitous, exactly, but the lengthy descriptions of it, and even that goes a long way toward world-building and accurately conveying the horror of the situation. 
 A bit on the writing: This is not Shakespeare. There's a lot of "basically" and "of course" and "in other words," and there's a LOT of use of the passive voice. Whether this is a writing issue or a translation one is a mystery to me, but you'll roll your eyes at the writing at least once a chapter, I'd say. (Note that I remember seeing at least 70 chapters here... start your eye exercises now, so you're prepared for all the rolling!) But writing quirks aside, this is really engrossing, the kind of book I blew bedtime by several hours for three nights running.