This was a fun little book, and a quick read/listen. I started and finished it in the same day. It's a little hard to believe that our main character is only 12 years old but that's pretty impressive if there are 12-year-olds who can code like that. And since it is about middle schoolers it probably does skew that way, but I still enjoyed it. I would definitely recommend it to middle school age kids and elementary age kids.