I honestly don’t know “the best book about creativity”, but I think that if you are interested in creativity, this is one of the best books to read: Show Your Work!: 10 Ways to Share Your Creativity and Get Discovered by Austin Kleon.
And maybe you are wondering, why am I recommending this. Easy! Maybe we don’t know about it, or we do and just ignore it, but somehow we all have a creative part living inside of us, it could be the origin of our biggest success.
This book changed the way I see things because it helped me realize that sharing is as important as creating. As an introvert, it gave me advice on how to overcome those strange feelings of anxiety and give myself some credit for my creativity. All of this, in a book that you could finish in less than a day.