Amulet - Kazu Kibuishi

Graphic novel star Kazu Kibuishi creates a world of terrible, man-eating
demons, a mechanical rabbit, a giant robot---and two ordinary
children on a life-or-death mission. After the tragic death
of their father, Emily and Navin move with their mother to the home
of her deceased great-grandfather, but the strange house proves
to be dangerous. Before long, a sinister creature lures the kids'
mom through a door in the basement. Em and Navin, desperate not
to lose her, follow her into an underground world inhabited by
demons, robots, and talking animals. Eventually, they enlist the
help of a small mechanical rabbit named Miskit. Together with Miskit,
they face the most terrifying monster of all, and Em finally
has the chance to save someone she loves.
Eventually, they enlist the help of a small mechanical rabbit named
Miskit. Together with Miskit, they face the most terrifying monster
of all, and Em finally has the chance to save someone she loves.