I listened to an episode of a book reading of
The Discovery of Slowness by Sten Nadolny.
The book is described on the site as being a fictionalised meditation upon Sir John's life which takes the biographical facts and creates a richly-imagined inner world for this great man.
If you want to listen to the episodes already broadcast you can by going to -
Book Reading Unfortunately you can't hear the first two episodes which I assume cover his life on land prior to joining the navy but the downloads do go back to episode 3 if you check the page out