What is the first book of The Chronicles of Narnia?

The first book is The Magicians Nephew.

It also is The Lion, The Witch, and The Wardrobe in certain versions.

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The first book in the series is The Magician's Nephew but C.S. Lewis wrote the Lion The Witch and the Wardrobe first...1951 if im not mistaken...(published) He wanted all of us to read LWW first and it was dedicated to his godchild, Lucy.(I forgot the last name) ^^