There's nothing remotely that creepy about the book. Really, it just looks like some kid's book who left it behind and you just put it in the closet with the board thinking it was... Evil... I guess.

Anyway, all it is is some story about a little girl living here with her family. She had a little sister, apparently, and the two would go to the mountains at night and they made some friend that gave them powers, the girl who wrote this getting the most powerful power. Her sister didn't get too much and got angry a lot, fighting with the other kids, getting dirty, and forced their mom to bathe her clean.

Hold on, Matt's giving me the business of dunking his head in water.

So, yeah, about the book. This place these kids went to seems interesting. I might go check it out.