These books have improved my productivity

The Alchemist by Paulo Coelho

The Success Principles by Jack Canfield

Tribes by Seth Godin

7 habits of highly effective people by Stephen R. Covey

How to win friends and  influence people by Dale Carnegie

I am sure one or many of these books would raise your productivity ten-folds.
What books would “you” recommend to me or other readers here ? Do mention !