Bowen's sports books are fantastic for readers in grades 3-8, and it's great to see him branching out into mysteries. They are short, strong enough on sports details that I don't quite understand some of them (which is a GOOD thing), and have characters who work really well together. Adding an element of mystery to this is perfect, and a great way to let fans of early chapter book mysteries like Ron Roy's or David A. Kelly's Ballpark Mysteries challenge themselves a bit. The retro cover is attractive, and different from the regular sports books, and there's a bit more sports history than Bowen usually has, which is interesting, but the girl power message remains strong. I'm curious to see if Aiden and Ava get to do more investigation.
The slight Encyclopedia Brown vibe will work well with younger students, but older ones who love mysteries will expect a more serious mystery. Think Souders' Coop Knows the Scoop-- it's a historical MURDER mystery. It was a bit unnerving when the kids went to visit the former police chief and he just invited them into his house to chat. Sure, Encyclopedia would have done that, but that seems like a bad idea in 2021. (Although, if the former police chief turned out to be a psychopathic killer who kidnaps the children, my students would totally read that!)