The Book of Henry Precocious 11-year-old Henry (Jaeden Lieberher) takes care of his single mom (Naomi Watts) and his younger brother (Jacob Tremblay) in this family drama. When Henry discovers a secret about the family next door (which includes his classmate, played by Maddie Ziegler), he takes it upon himself to come up with a solution (aka murder). Watch The Book of Henry on HBO Max now. Image Source: Focus Features