Bill Gates' recommended books are now available for free on Spotify, with over 200,000 audiobooks offered to Premium tier subscribers. Some of Gates' recommended books include "Tomorrow" by Gabrielle Zevin, "The Remains of the Day" by Kazuo Ishiguro, and "Team of Rivals" by Doris Kearns Goodwin. Gates also suggests reading "Range" by David Epstein and "Why We Sleep" by Matthew Walker for personal growth and success.