Since reading The Notebook I read two other Nicholas Sparks novels (Message in a Bottle and Nights in Rodanthe), and I'm currently reading The Rescue.
What can be said about these books? The storylines and many details are overtly calculated, and there are themes and surroundings that keep coming up from novel to novel (not in good or bad). North Carolina, losing someone, surviving as a single parent, being surprised by love, insecurities, storms, seaside, sex. Working part time in a library. The beauty of nature. Sparks is good at observing human gestures and body language and describing everyday life and worries. He knows how to write an entertaining story that's easy to relax with. Nothing larger than life, but writing a romantic novel that will not completely bore the reader to death is a skill.
(While I was reading these books I did some Google searches on the different places that the stories locate in. Rodanthe and the Outer Banks area in NC seem very beautiful. I love seashores, so these surroundings are a real plus to me. Travelling through stories is nice.)