Perhaps more than even Christmas and Halloween, the Mexican Dia de los Muertos (‘Day of the Dead’) is a holiday ripe for cinematic exploitation: it is, after all, a festival of colourful and gothic storytelling. Jorge Gutierrez, who has previously channeled his love for Mexican folklore into the award-winning El Tigre: The Adventures of Manny Rivera for Nickelodeon, pairs up with screenwriter Doug Langdale and uses the day as a backdrop for The Book of Life‘s imaginative story of childhood rivalry and feuding gods. It’s a moderately ambitious but highly charming fantasy-animation with a fun multi-level narrative. We open on…