Apparently, David Bowie was a bookworm, from what I have garnered through articles here and there.
Here is a link on his website, to list posted on October 1, 2013, of his top 100 books.
The list includes a variety of authors and genres, including classical books, and authors considered masters, but also little-known authors in the stream Literature.
Take a peek into the reading world of David Bowie. You might be surprised, but then again, you might not.
Also, take a look at this poster! David Bowie was an advocate regarding reading!
You might also want to check out this biography by Marc Spitz: Bowie: A Biography.