Boxen was the imaginary land created by C.S. Lewis and his brother during childhood.
The boys developed stories about a world inhabited by anthropomorphic animals, especially after Warren Lewis introduced an interest in India and Clive became fascinated by animals in clothes. Their shared imaginative project combined two earlier fictional settings, Animal-Land and India.
Boxen was not the same as Narnia. Lewis created Narnia decades later for his published children’s fantasy series, while Boxen belonged to his private childhood writing and drawings. Some Boxen material survived in notebooks and manuscripts.
The childhood world shows that Lewis’s interest in talking animals and invented countries began long before The Lion, the Witch and the Wardrobe. It should not be described as an early Narnia novel.