Check out this interesting interview with Simon Tolkien on NPR. He gets into some interesting details about his relationship with his grandfather, including some specific memories and influences. While the interviewer can be tough to listen to, Simon is certainly a well-spoken author.
Listen Here (click the small “Listen” link in the upper left of this page)
If you didn’t know, Simon Tolkien is an author in his own right, having pubished two books, Final Witness and The Inheritance. While his grandfather was a philologist, and ultimately wrote from that perspective, Simon Tolkien is a former London barrister, and writes from his experience in law.
I haven’t read his books, but this certainly piques my interest.