Wish you were dead

In the beginning of the book an anonymous writer makes a blog and he writes about the guy's and girls who he does not like. After some hours or 1 day, tops something happens to the girl or the guy. First Lucy was the first sacrifice of the blogger. The whole school is worried but the guy who is most worried is Lucy's best friend Madison Archer. He was the last person who saw Lucy before she disappears. 

After a party Adam also disappears. Madison thinks that it has no relation with the disappearing from Lucy. She wants to talk with Tyler but he does not want to talk with her. She loves him but he does not want to talk with her. When Courtney disappears the city becomes panic. And at last Madison is visited.