For any of you that have 7-9 year old boys, these are great! They are educational, fun, suspenseful and just great. I enjoy reading them as much as Ty does.
My second grader is still enjoying these, but I've lost interest. It's your typical mystery, where basically the same thing happens each time. Granted, there are different gadgets which is cool. This one also didn't talk about his brother at all. He even got to ask the queen of England for a favor, and I thought surely he's going to ask for her help to find his brother, but... nope HOMEWORK. Seriously, Jack!