Cordelia, Brendan, and Eleanor Walker, aged fifteen to eight, must rely on a mysterious book to face the Wind Witch and her father, the Storm King, who have kidnapped Dr. and Mrs. Walker and brought them to a strange world of magic.
Even though the Wind Witch is banished and the Walker family is now rich, the children are still struggling in their new elite school. Meanwhile, as Denver Kristoff continues his search for his daughter, Dahlia, the Walker family is forced to set off on a new quest around the world with old enemies, new friends, and dangerous new challenges.
"With their last adventure just barely over, the Walker kids thought life would finally go back to normal. But things dont remain calm for long... especially when the colossus Fat Jagger turns up in San Francisco Bay--and hes in danger! With the police closing in, the Walkers must figure out how to save their giant friend. When a frost beast is spotted in Santa Rosa--and more mystical creatures start appearing all over America--its soon clear that...