The school counselor, searching for answers about The Smart Kid, goes to the school library and sees Nancy Drew and Hardy Boys books on the shelves.
These were popular mystery books of child detectives solving crimes.
My twin, Bill, and I grew up reading The Happy Hollisters, who were a family of kids that solved crimes.
My other favorite child sleuth was Encyclopedia Brown.
http://thehappyhollisters.com
https://en.wikipedia.org/wiki/Encyclopedia_Brown