I am looking for the name of a book series that I read several years ago. It takes place in a world where the zombies have taken over. The main characters brother is a zombie hunter who takes contracts to quiet zombies of peoples loved ones. There is a character called the lost girl. The kids all collect Zombie trading cards. There is a duo of evil zombie hunters who have a compound where they kidnap living people to fight against the dead.

Is any one could help that would be great. Thanks.