What are some good astrophysics books?

I'm about to start the tough part of my undergrad work in physics, and I would like to specialize in astrophysics. I was hoping for some advice on which books are a good introduction to this topic...to sort of get the basics down.|||The classic text would be Carrol %26amp; Ostlie "An Introduction to Modern Astrophysics". I wouldn't recommend it to someone who hadn't taken any physics, but it will be a useful reference (and teaching tool) for all areas of astrophysics - we use it even in grad school.