For 13 year olds here's some info to help you recommend.
Genre's
I like horror ,but I,be never actually read a horror story m
Stories about superheroes might be nice.
Romance , just ,not to obvious it's a romance oh and none of that um YKW.
Fantasy!
Adventure.
Christian fiction.
Comedy.
, Ok To be honest I like everything! Except stories about animals.
Things not to suggest: Percy Jackson ,chronicles of Narnia, Harry potter,babysitters club, Dear mAmerica etc.