'Absorbing'GUARDIAN'Magical'GOOD HOUSEKEEPING'Suspenseful' MAIL ON SUNDAY'Wildly inventive' LIZ MOOREA REESE WITHERSPOON BOOK CLUB PICKIn this dazzling debut novel, a young reclusive coder unearths the story of a lost Shanghai pencil company and a legacy of magic, espionage and family secrets that will alter the path of her life forever.