INSTANT NEW YORK TIMES BESTSELLER - NAMED ONE OF THE BEST CHILDREN'S BOOKS OF THE YEAR BY THE WALL STREET JOURNAL "Perfection." -The Wall Street Journal The bestselling author of Wonder returns with an enthralling adventure about a boy on a quest to rescue his father, with only a ghost as his companion and a mysterious pony as his guide. Twelve-year-old Silas is awoken in the dead...