Books in the The Little Bad Book series

HEY, YOU! PSSST. You might not believe this, but I've discovered the biggest secret in the world. Yes, honestly! Should I tell you? Okay. Just be careful! It will be the scariest thing you've ever read! I hope you can take it. Can you I bet you can. You're brave, aren't you? Do you dare to read me? Come on--do it--read me! You are the lucky reader who can discover the secret the little bad book is willing to share. The puzzles and riddles will challenge you, but it is definitely worth it! Go ahead and take a chance! You are the baddest one there is!