Recently, I've been looking into changed and redesigned logos. I found this website which is really good for showcasing the old and new, and has quite a community of people commenting and sharing their thoughts.
Examples of redesigned logos are quite hard to find in published books, as by the time the book becomes published there's a possibility that in a year or so the new logo gets replaced by something newer.
Brand New
Rebranding is something I find interesting, as it can be a major struggle to change peoples opinions of an existing company. I find especially with food brands, they have to keep changing their image to fit with the ever changing new ideas on what's healthy, what does or doesn't cause cancer, and the trends for what children find cool.