Personified animal story of a Silverback gorilla, elephants and a mutt.  Inspired by a real captive gorilla who lived in a mall.  Things change when baby Ruby comes to stay and a promise is made between friends.  Slow paced but an easy, quick read.  It was a sweet animal story.  A touching tale that hits home, as right here in Hope, Maine we have rescued circus elephants coming to a refuge soon. 
http://hopeelephants.org/faq