Simplify the following text for a Grade 9 native English-speaking person.
Original: The Lion , the Witch and the Wardrobe , completed by the end of March 1949 and published by Geoffrey Bles in London on 16 October 1950 , tells the story of four ordinary children : Peter , Susan , Edmund , and Lucy Pevensie .
Simplified: The Lion , the Witch and the Wardrobe , completed in the spring of 1949 and published in 1950 , tells the story of four children : Peter , Susan , Edmund and Lucy Pevensie .