the Host

Okay, so have any of you read or started reading Stephanie Meyer's new book "The Host"?! I have started, but I have to literally force myself to read it hoping that it gets better. I feel so stupid as I read it because I don't understand ANYTHING!!! As it talks about "seekers", and "hosts", and "wanderers" I can't seem to know what the plot is, what is happening, or who the characters are! I don't know....maybe some help please?! Tell me what is supposed to be going on in this book so maybe I could finish it! :)