I listened to this as an audiobook and really enjoyed it! It's a short, fast paced story but it packs a punch in strong characters and strong themes. Castle, aka Ghost, is a junior high student with a major trauma in his past, a lot of anger, and a natural talent for running. When he catches the eye of an Olympic runner turned track coach at a local park, Ghost gets recruited to a local running team. He's never been on a team before and faces unexpected challenges and opportunities. The question is whether he can stop running from his past, and instead run towards his future. I'm definitely planning to listening to more of the series.