I try to read the books I buy for children; it's only fair. If I find them dull, the child is likely to find them dull as well.
I picked up The Pet-Sitting Peril, which is about 20 years old, 'second hand.' The story is a mystery, with a twelve-year-old boy as the hero. While our hero is taking care of other people's pets for extra spending money, he encounters several very dangerous situations. While he is the hero, he does have help in solving the situation 'from the pets he is sitting.' And from friends, both male and female. I cannot reveal much more without ruining the book. Let me leave it at this: The book is an exciting tale, and likely to have youngsters reading under the covers with a flashlight!
Estimated Age Group: 10 to 13 (As a caveat, for a youngster who still has trouble telling fiction from non-fiction this book is not appropriate. It puts the hero and the pets he is sitting in danger of dying, and could be very upsetting to a child who doesn't understand fiction. Additionally, children who imitate fiction shouldn't be give this book either.)