Yes, that is correct. "The Voyage of the Dawn Treader" is a book in C.S. Lewis's series "The Chronicles of Narnia", and it does indeed explore the conflict between fate and free will, which is an important theme in Christian theology.
Throughout the book, the characters are faced with choices that will determine their fate, and they must grapple with the tension between their own desires and the greater plan that Aslan (a Christ-like figure) has for them. This struggle between individual will and divine providence is a central theme in Christian theology, and Lewis explores it in the context of a fantastical adventure story.
Additionally, Lewis was a Christian apologist, and he often used his fiction to explore theological ideas and themes. "The Chronicles of Narnia" as a whole can be seen as an extended allegory for Christian beliefs, and "The Voyage of the Dawn Treader" is no exception. The book deals with themes of sin, redemption, and the ultimate victory of good over evil, all of which are central to Christian theology.
Overall, "The Voyage of the Dawn Treader" is a rich and complex book that touches on many important themes in Christian theology, including the tension between fate and free will.