You get to into them and don't do what you're suppose to do
You start getting out of shape when you just sit and read
Sometimes you forget to eat because you're that into it
You start living in the books instead of in reality
You try to be like your favorite character, but fail miserably
You wish to have the life of your favorite character so much it hurts
Your life revolves around the book you're reading
You stay up late just to finish "one more chapter"
...but in the end you just can't stop reading.