for those of you asking about the book….
So basically, if you are from Japan/can understand Japanese there are a couple Maru books already out (and a DVD!) that are solely in Japanese. You can get info about those on the left sidebar of maru’s blog
but if you’re from US, UK, Canada, or Australia, Maru’s owner released a book in english all about Maru called I Am Maru
here is information if you are interested in buying it!