Yes (which BTW provides additional proof of my Planet of the Apes conspiracy theory :-) Here's a summary of the movie version, which I guess combines the third book (that I haven't read yet):
---
This program combines the second and third books in The Chronicles of Narnia. Young Prince Caspian trains to assume his rightful position of King of Narnia. The position is currently held by his corrupt uncle, King Miraz. Caspian's Nanny tells the boy stories of the old Narnia, where talking beasts, fauns and dwarfs inhabited the kingdom. When Miraz hears of this, he banishes Nanny.
Caspian is given a new tutor, Dr. Cornelius. Dr. Cornelius learns that Miraz and his wife want to have Caspian killed, so their son can be heir to Narnia's throne. Cornelius warns Caspian, wo retreats to the haunted forest. In the forest, Caspian meets the fanciful creatures he had heard so much about. They discover that Miraz and his army are coming into the woods for Caspian.
Fortunately, Caspian has a magic horn that summons help from Aslan the lion and four English children -- Lucy, Edmund, Susan and Peter, who once ruled over Narnia. With their help, Caspian assumes the throne. The four return home. Edmund and Lucy are sent to live with their cousin, Eustace. At Eustace's house, they discover a painting of a beautiful Narnian ship, the Dawn Treader. Lucy and Edmund are drawn into the picture. Eustace latches onto them and is also sucked in.
On board the Dawn Treader, Lucy and Edmund cross paths once again with their old friend, Caspian. Now king, Caspian has set out ot find seven of his father's friends -- lords who were banished from Narnia by King Miraz.
The boat travels to Felimath, where the travelers are captured and sold for slaves. Caspian is sold to Lord Bern, who turns out to be one of his father's friends. Lord Bern helps the crew on their way, and they travel to many lands. They eventually find the other missing friends. Finally, after the last friends are found, a princess appears before Caspian. She tells him that in order to break the spell that cast a deep sleep over the land, he must sail to the world's end and leave one ship member behind. So the Dawn Treader sails on for its final greatest adventure.
In my class the boys always raced to try to check out the Tarzan and Conan books before someone else could :) I'm trying to remember what other series we read as kids. . .