My 10 year old son read this and really enjoyed it. He wanted me to read it, so I did. I was hoping for something like Fablehaven with cross-over appeal for older audiences, but Janitors has its feet firmly planted in its target audience. And there's nothing wrong with that. I appreciate that for once, a parent is involved in the mystery and magic, but I'll leave the sequels for my kids to enjoy on their own.