If you've never seen ABC's Castle, well you are among many people. This is the kind of show that will hook you slowly. On the surface, it seems like a jovial cop show with typical romantic conflicts and tensions. However, the stories range from comical to serious to keep things interesting, and the will-they-won't-they suspense between the main characters keeps people tuning in week after week.
Richard Castle plays a writer who writes books about Kate Becket, a detective. He began by merely shadowing her, but has evolved into her partner at work (although he would like to be more). The books are often plot points on the show, and are a vehicle for Castle to express his feelings for Kate under the guise of fiction.
Interestingly, these books are REAL. Yes, real books published by "Richard Castle" who does not actually exist, since he is a television character played by Nathan Fillion. Castle premiered tonight, I found out about the third book, Heat Rises, ten minutes ago, and after a quick E-book download, I'm reading it right now! I'm shopping at the speed of light! Gotta love modern technology!
If you are interested in getting into the show, I recommend starting from Season 1 & Book 1. I hope you enjoy it as much as I do!