It's worth recognizing the late Christopher Tolkien for his life's work protecting, preserving and collecting his father's writings, in a deeply moving example of filial piety.
(Obviously I've never been a fan).
For something completely different, but the same here is a YouTube clip of Billy Strings playing with his dad, a very similar dynamic here: https://youtu.be/_6U6NCvOfl8
Also, they might not earn as much as you imagine: They sold the movie rights in 1969 for £100,000.
https://www.worldcrunch.com/culture-society/my-father039s-qu...