y do they skip the firs book wen making the Moves

Lewis firstly wrote the lion, the witch and the wardrobe so they made the 映画 the same way as Lewis wrote the books

The Magician's Nephew was the first according to the chronological order, but in the final completion order LWW is the first. Check it out on link

Thanks for the info i was wondering the same thing but now i know thats pretty cool!