Cristiano Ronaldo beş kitap yazmıştır: 1. "Moments by Ronaldo" (2007). 2. "Cristiano Ronaldo: 100 Facts They Don't Want You to Know!" (2015). 3. "Cristiano Ronaldo Striker Force 7" (üç cilt). 4. "Cristiano Ronaldo: The Biography" (2015). 5. "Win The Day: Courage, Positive Thinking and The Warrior Spirit" (2020).