My 11 year old son absolutely loves these books. They are adventurous and full of suspense, but not too scarey. There is reference to scripture in the stories and the Cooper Kids often seek biblical guidance. They're wonderful for my son - he likes to read, but is picky about his books.
This book was definitely interesting and character's were realistic and Christianly was wonderfully portrayed, but I didn't quite care for the book because it wasn't realistic enough. Other than that the book is great.