Ali Cross: Like Father, Like Son (Ali Cross, Book 2) by James Patterson
 
Alex Cross’s son Ali is an accomplished mystery-solver and #1 bestseller. A crime at a concert near his school sparks his newest investigation, and it gets dangerous fast. Sometimes it’s good to have a father in the detective business.
 
ALEX CROSS is a genius detective. 
 
ALI CROSS is following in his father's footsteps. 
 
When Ali sees a friend get hurt, he’s the best person to find out who did it. Even if he's only a kid. 
 
After all, he’s Alex Cross's son. Solving crimes runs in the family.