Kiddy Kamp (Jack, Murder, and Maine Book 2)

You know one man died and another one disappeared on the same stretch of river. You also know you need to work, but teaching is tough, substituting is worse, and if it's in a youth prison, it can be a real killer. Especially if the prison's superintendent was the only person on the river those two days and your father was the man who died and you're involved in the investigation of the disappearance.
But, who knows, with a little luck you may find love along the way, if you don't get killed first.