There are a few ironclad rules in any world created by Nicholas Sparks. If you’re a man, you have square shoulders and muscles that reflect your belief in a hard day’s work. If you’re a woman, you have striking emerald eyes and blond hair, or hazel eyes to offset your high cheekbones. If you own a farm, a harmonica-playing black man full of hard-earned wisdom lives next door. If you’re Mexican, your parents own a

…