on the front of twilight it has ether edwards hand or bellas holging an apple, but then new moon has a flower eclipse a red ribbon and breaking dawn a chess game i dont get how the last three represwnt the story?

The parrot tulip on the New Moon book cover doesn't really have an explanation. Little Brown, the publishing company of the book, chose it. But, i think it has to do with her life with Edward coming to an end. the flower is wilting. Although, we know that they reunite in the book.

If you look closely, the red ribbon on the Eclipse book cover is frayed, tattered. That symbolizes everything that had happened when Edward had left. He left, Jacob helped Bella, and Bella ends up ~torn in Eclipse. (However, Bella isn't really torn. She saw what her life would be without Edward and just couldn't live with that)

Breaking Dawn's cover of the white queen and red pawn, that symbolizes Bella and her immortality. When Bella was human, she was the weaklink. The weakest of everyone that she knew. But, when she was changed into a vampire, she became the strongest. She went from being a weak pawn, to the strongest piece on a chess board... the queen.

I know it doesn't help much, I thought I knew New Moon and Eclipse... I'm sure about Breaking Dawn though. If you look closly at the pieces one is red and the other is white... the white one, could be classed as cold which would represent Edward and the red, equalling hot as he's a werewolf, represents Jacob. Chess can be a two way game or played alone... but I think that Edward and Jacob are used as pawns here but both cold and hot are needed for Bella in this book when she's pregnant and getting really hot and cold. I hope that helps... and I've not confused you more

Wilting flower-her life coming to an end after ed leaves
Ripped/frayed ribbon-being torn between Jacob and Ed
Chess-thjer are many therories:
1. Pawn=bella huma
king=bella vamp
2.board=bella human
pawn=bella pregnant(shes weak)
King=bella vamp
3.board=bella
pawn=Jacob
King=Ed (ed=jake are fighting over bella)