* C.S. Lewis: His most famous books are The Chronicles of Narnia series (especially "The Lion, the Witch, and the Wardrobe") and Mere Christianity.
* Merle Wookey Lewis: His most famous book is likely The Book of the Damned.
* Sinclair Lewis: He won the Nobel Prize in Literature for Arrowsmith. His other famous books include Main Street, Babbitt, and Elmer Gantry.
Please clarify who you are asking about, so I can provide you with the correct information.