Hailed as “a breakneck, jam-packed roller coaster of an adventure” by J. K. Rowling, this New York Times bestseller is the first installment in the explosiv

Just when the Walker kids thought they were safe, the Wind Witch blasts Kristoff House into a crazy world of battles, beasts and cyborgs.

It's just another average day for Bliss, an ignored linguist at the Department of Defense. However, when Bliss unlocks the secret translation of an ancient scro

With their last adventure just barely over, the Walker kids thought life could finally go back to normal. They escaped Dahlia Kristoff, the evil Wind Witch, yet

Since the siblings' last adventure, life in the Walker household is much improved-the family is rich and the Wind Witch is banished. But no Walker will be safe