A detailed look at the making of this hybrid hand drawn/CG animation film. Highly recommended.
From the publisher:
A stunning coffee table hardback exploring the art of Sergio Pablos' hand-drawn animated original Christmas film. Showcasing the full animation process, including an innovative new lighting and shadowing technique, this book features concept art, pitch documents, character turnarounds, key art, final artwork, exclusive sketches, and interviews with the team behind this heartwarming film.