The Sword in the Stone

 Fiction by T.H. White.

https://www.barnesandnoble.com

This is the first book in the classic The Once and Future King, a set of four books published together in 1958 about the legends of King Arthur. I got a free limited version of this from audible.com, but was not able to finish the full thirty-three hours (!!!!) before the time expired. Unsurprisingly....

This is the story that the 1963 Disney animated movie was based on, and in the beginning it had the same fun lightheartedness of that film. But later on, it got kind of boring. I think this was because the author was trying to insert modern (1950's) political statements into a classic story, but I could be wrong. 

Anyways, it's a decent story, and the characters are much less one-dimensional in the book than in the Disney version.