Given Time - Louis King

Nine-years old Paul Thompson never saw the hit and run driver who killed him. And only briefly glimpsed his guiding angel Serah when she returned him to life. But that miracle left him introverted and withdrawn. As a schoolteacher, his only motivation is helping his students and turning the lot where he was struck into a playground. But when Serah returns, now needing his help, they realize there is much more to accomplish before the time they're given runs out.