With their last adventure just barely over, the Walker kids thought life would finally go back to normal. But things don’t remain calm for long  .  .  . especially when the colossus Fat Jagger turns up in San Francisco Bay—and he’s 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—it’s soon clear that the characters from Denver Kristoff’s works are invading the real world. It’s up to Brendan, Eleanor, and Cordelia to reenter the book realm one last time to keep two worlds from colliding, causing mass destruction.They will have to track down three Worldkeepers hidden in Kristoff’s books—magical items that when used together will seal the worlds off for good. But the Walkers’ first move leads them straight into the Wild West, with ruthless outlaws and lawless deputies—and that’s just the beginning. They’ll encounter dinosaurs, aliens, killer robots, and the Wind Witch herself—with new friends and old—and be faced with some of the deadliest choices they’ll ever have to make. The scariest thing of all could be deciding who to trust, since everyone is hiding something. . . .Praise for House of Secrets“A breakneck, jam-packed roller coaster of an adventure about the secret power of books, House of Secrets comes complete with three resourceful sibling heroes, a seriously creepy villainess, and barrel loads of fantasy and fear.”—J. K. Rowling“A swift-paced, clever page-turner for any reader who has wanted to take part in literary adventures. . . . The story is compelling, great fun, and sure to be popular.”—ALA Booklist“In a rousing adventure reminiscent of The Emerald Atlas, director Columbus and author Vizzini catapult a trio of siblings across time and space, as they square off against a forgotten writer’s literary legacy. The nonstop action comes with increasingly high stakes. . . . Wildly imaginative.”—Publishers Weekly“The story is an engrossing page-turner with a parade of near escapes, hilarious mishaps, and courageous face-offs with terrifying villains. The nonstop action will keep readers on the edge of their seats.”—Bulletin of the Center for Children’s BooksPraise for House of Secrets: Battle of the Beasts“A dark action-adventure-fantasy with surprising heart.”—Kirkus Reviews“Another imaginative, fast-paced adventure that is sure to please fans.”—ALA Booklist