I'm not sure who Trevor Holt specifically is in this story without more context. It could be a fictional character created for a particular book, movie, or other form of media.
One popular type might be those that imagine them on new and exciting investigations outside of the known cases. For example, a fan fiction could place them in an old, haunted castle in Europe, exploring the mysteries within. Another could be about their early days of starting out in the paranormal field, how they met and what challenges they faced.
Well, it depends on how you define 'good'. Trevor Story has shown flashes of brilliance, but his consistency can be a bit up and down. However, when he's on his game, he can be a real force to be reckoned with.
You can start by looking on fan - fiction websites like Archive of Our Own (AO3). It has a large collection of various fan - fictions, and there might be some dedicated to Jason Hawes and Grant Wilson. Another place could be FanFiction.net, which also hosts a wide range of fan - created stories.
As far as public knowledge goes, no. Trevor Noah has been occupied with things like touring for his stand - up comedy, his work in television and digital media. He may be interested in writing a novel in the future, but there are no signs of it at the moment. He might be more focused on his current platforms where he can reach a large audience and express his views on various topics, from politics to social issues.