This story is worth reading, because it's the last of Peter and Susan's adventures in Narnia and introduces an important character, Prince Caspian. However, the story felt clunky and poorly plotted, with the strongest moment being when the Pevensies realised they were in their crumbling castle of Cair Paravel.

A good chunk is taken up when the Pevenies are told Prince Caspian's backstory, but they don't actually interact with him that much later on. The majority of the story is taken up by them travelling to another battle, which is quickly won, and they go home again.

I felt there could have been a better way of having the Pevenies come back to Narnia, and meeting Caspian without there being a battle, which overshadowed any character development they and Caspian could have had. However, it's good back story to have before Voyage Of The Dawn Treader.