Beautiful Creatures by Kami Garcia and?

Okay so it's been a long time since I've read Beautiful Creatures and I never finished it. I eneded on page 305 because I got distracted by other books. I don't want to start over so can you please give me a long summary and overview with the main events and reasons why they were going to that library? I don't remember. And on the previous chapter I was on I think Lena was Yelling at Macon. That was before the chapter when they head to the library to get some book with a moon. Can you tell me all that happened up to page 305? Idc if the parts up to 305 have spoilers because I have already read those pages but don't spoiler anything after page 305. I never made it there yet.