This is a good primer and there's nothing really wrong with it. But it's not quite the best of any world.
If you want to follow an animated film through production, I feel like you get a better takeaway from John Culhane's Disney's Aladdin: The Making of an Animated Film. Even though Hahn gives more information on certain important jobs like in-betweening and editing.
On the other hand, although Don Hahn has great perspective as a producer, you can't top the 50-year track record of Thomas and Johnston in The Illusion of Life: Disney Animation Even though Hahn's book is a much more digestible size.
A good book about Disney way in making animation movie, not a pro book, but it was nice to read it. It's add more knowledge to me, and it has a beautiful drawing and photos. Give it a try.