Second Son goes back to Reacher's childhood, specifically age 13 when his family is newly stationed on Okinawa. Local bullies threaten the new to town Reacher brothers. Reacher kisses a girl on the beach. Reacher acts and, worse, talks like adult Reacher. He gets to solve crimes like adult Reacher, including explaining to military investigators exactly where his father's missing code book has ended up. At age 13. Just scan right.