Christopher Finch is one of the premier authors on Disney and animation history. Winnie-the-Pooh: A Celebration of the Silly Old Bear is definitely one of his best works. While it may not quite match up to the sheer power of his most recognized book on Disney, The Art of Walt Disney, it is definitely a wonderful look at Winnie-the-Pooh. The book appropriately starts out with a look at A.A. Milne, the author of the original Pooh books. The chapter on Milne is clear, concise, and very informative. As the book slides into the Disney version of Pooh is starts to "Disnify". There is the chapter on the four Pooh shorts, the chapter on each of the characters, etc. While these sections are interesting, they seem a little static. There could be more on the relationships and interactions between the characters. The book serves as more of a basic guide to the world of Pooh than anything else.
If you want a nice gift book that is a fantastic overview of how the Disney pooh came to be, you will probably enjoy this book. There is yet to be a book published, though, that truly delves into how Disney made Pooh such a worldwide smash success, but right now this is the definitive book on the Disney Pooh.