What book should I do for my book poster?

I have to make a book poster for my Language Arts cl and I am stuck between two books: A Walk to Remember and Dear John. Both by Nicholas Sparks. I really want to do Dear John, because it would be really fun, and I could get pictures and stickers of like the beach and symbolic things. But A Walk to Remember is SO amazing. It has such a great plot, even though it is really sad. I LOVE that book. If I could get any recommendations by this Thursday(5/13/2010) That would be FANTASTIC!! THANKS!!