I enjoyed the story, and it's action packed. The biggest problem is with the way the demigods were conceived. There is a lot of talk about the gods sleeping with humans to make the demigods. Until your child is ready to understand babies out of marriage, this book isn't for him.
this series is really dark. i think you should read them and know your child's limits before allowing them to read them. they are very engaging, but they affected MY dreams. I have one child who can handle such things and another who would be too affected.