wat do the covers of the twilight saga Bücher represent??

This is what i've been told - so please correct me if im wrong anyone =]:


Twilight - the apfel, apple represents the forbidden Obst tastes the sweetest ( as in edward is the forbidden fruit)

New Moon - SM has sagte she had no say at that cover - so it has no potential meaning

Eclipse: The broken ribbon is about Bella being torn between Edward and Jacob and her human life etc ...

And Breaking Dawn - The red chess piece is bella as a human, and the white Queen chest piece represents Bella as a vampire.

Twilight Cover: represent the forbidden fruit

"the forbidden Obst tastes the sweetest"

the rest I don't know