The Lion, the Witch and the Wardrobe by C.S. Lewis
Series: The Chronicles of Narnia #2
By far the most famous of the series, it introduces us to the famous Pevensie children. They enter Narnia by a more direct route than Digory but the magic is the same. They arrive in Narnia in a time of need as Jadis, now known as the White Witch, has claimed rulership of Narnia and oppresses the inhabitants in an eternal winter. However evil beware because Aslan returns. One thing I love about Lewis’s style in these books is the occassional acceptances of it being a book as if the stories were gleaned from interviews. It lends the tales both an extra sense of legend and reality.