Guardians of Childhood, book 2: E. Aster Bunnymund: And the Warrior Eggs at the Earth's Core!
William Joyce2012

E. Astor Bunnymund (aka The Easter Bunny) is anything but average. Highly skilled in martial arts and one of the oldest magical beings on earth, Bunnymund is the architect behind an unrivalled network of tunnels, which combined with his supernatural speed, gives him secret access to almost any place of the planet. He's apt to be in anyplace at any time, but his all-time favourite place to be is an underground metropolis on Easter Island where eggs are worshiped and Bunnymund is king.
There's something foul in the state of Eggonooloo. Pitch, Nightmare King, has sent a venomous serpent to attack Bunnymund's royal guard of warrior eggs--and, for Bunnymund, this is about much more than fixing a few rotten eggs. E. Astor, with the help of MiM and Sand Mansnoozy, links up with Nicholas St. North to get one step closer to saving Dreamland and ridding the world of Pitch and his Nightmare Men.

Titre original : Guardians of Childhood, book 2: E. Aster Bunnymund: And the Warrior Eggs at the Earth's Core! (2012)