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 until she is found, and summoning her to San Francisco brings all the danger that comes with her and sends the Walkers on a mysterious journey through Denver Kristoff"s books. As the Walkers travel from ancient Rome to World War II to Tibet, they"ll be tested - by Denver Kristoff, the Wind Witch, and each other - in ways that cut deeper than before. Fantasy fiction fans who enjoy Rick Riordan will find much to love in this thrilling and action-packed novel!