Ever since his mother died, Ben feels lost. At home with her father, Rose feels alone. When Ben finds a mysterious clue hidden in his mother's room, and when a tempting opportunity presents itself to Rose, both children risk everything to find what's missing. Playing with the form he created in his trailblazing debut novel, The Invention of Hugo Cabret, Brian Selznick once again sails into uncharted territory and takes readers on an awe-inspiring journey. Set fifty years apart, these two independent stories - Ben's told in words, Rose's in pictures - weave back and forth with mesmerizing symmetry. How they unfold and ultimately intertwine will surprise you, challenge you, and leave you breathless with wonder.