Okay so books are like diamonds to married women. Except books are better.
Books are a big part of many fangirls lives. That is exactly why you never touch her books.
They might look nice and smell good but do not touch them, at all costs stay away from a fangirls books.
Fangirls most likely love their books to death and if you touch them she might hurt you and it will be your fault.
And above all never insult her book or refer to the movie instead of the book or just generally be annoying.
For example do not call Catching Fire Hunger Games 2.