The Guardians

I squeezed my fists together and clenched my teeth. I couldn't think like that. We have fought this dark entity off for centuries, we can do it again.
I took one more glance at the map before forcing myself to look away. I walked across the room to the dust layered case patiently waiting in the corner. The blade within still managed to gleam under the lights of the study even given my negligence towards it.
I opened it and picked it up.
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Jack is like every other kid. He has weird friends and everyday bullies. He even has a crush on a girl. To him the only thing extraordinary is that he goes to a high school that only allows in the best, but is that really true?
All of a sudden the principle dies and the librarian goes missing. Jack feeling something off goes snooping only to find a book. A book in which won't open.
As Jack finds out that things aren't what they appear and people aren't who they think they are; he grows steadily closer to his destiny and who he truly is. The only thing is, is that Jack has save the people he loves and his school if he even wants to survive to the end of the school year.
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So I've been remaking this story three times now and each time I'm not happy with the result. This time though, will be my last, if I'm happy with it or not. However, I decided to involve people. Through my entire story I want you guys to critique me. I really want the best for this book and I feel like it will be better with more people. So I would like for you to comment on this story about anything you don't like to just pure brainstorming. In this story you will be writing it with me.

P.S. This story is written in a guys point of view there will be mild mentioning of sexual stuff, but it will hold no actual sex. It will also have some cussing in it and obvious violence. I will not make this PG, it is for teenagers and up so if you don't feel comfortable with this content don't read please.