Ubisoft released a free book about the adventures of an anthropomorphic mouse name Reginald, who lives in the Child of Light universe.
See the blog post here:
http://blog.ubi.com/child-of-light-reginald-the-great/
And here is the free book:
http://ubistatic2-a.akamaihd.net/emea/gamesites/childoflight/E_book_COL_EN_.pdf (http://ubistatic2-a.akamaihd.net/emea/gamesites/childoflight/E_book_COL_EN_.pdf)