Books in the Otto the Book Bear series

Otto is a Book Bear and nothing makes him happier than when people read his book. But he also has a very special secret - when no one is looking he can come to life and explore the house. But one day something terrible happens: Otto's book is left behind when the family moves away, and now there is no one to read Otto! Otto must set off on his biggest adventure yet - to find a new home. But where is the best place for a Book Bear to live?