From the publisher:

From 20th Century Fox Animation and Blue Sky Studios, the creators of Ice Age and Rio, Epic tells the story of an ongoing battle deep in the forest between the forces of good and the forces of evil. When a teenage girl finds herself magically transported into this secret universe, she must band together with a rag-tag team of fun and whimsical characters in order to save their world -- and ours.

The Art of Epic shines a light on the previously hidden world of Epic, with over 300 pieces of concept art, character sketches, storyboards and digital paintings, along with interviews with the key animation talent.