My absolutely favourite kid's author and artist of picture books right now is Oliver Jeffers. I'm so excited and inspired by the artwork and stories! The Great Paper Caper is an unbelievably creative story and probably the most beautiful children's book I've ever encountered. The jacket cover says the age range is 6-9 but believe me if you're older than 9 you will fall in love with this book too.
The Great Paper Caper, Oliver Jeffers: When life in the forest begins to change; when trees mysteriously lose their branches, when whole tree trunks start to disappear, when homes are lost, the only course of action for the forest dwellers is to begin a full scale investigation. Alibis must be proved, clues must be sought but even so, blame is never far from anyone's thoughts.