You shouldn't judge a book by its cover. That's certainly true, but often, if you're in a magical school (or in a graveyard), you may want to just leave those books with the funny titles closed. Otherwise, all sorts of bad things could happen. Such is the case in The Big Book of Madness from iello. You just had to open that book and now look what you've done.
The game is a cooperative deck-building game for 2-5 players. Each of you is a student at a magic school and, well, you've let a whole bunch of monsters loose. You'd think they'd have bright red warning labels on those books that'd do that, but waddyagonnado? You're gonna get those monsters back where they came from is what! As such, you all must work together to turn six pages in the book and defeat all the monsters. I'm sure if you fail it'd be pretty bad, too.