There are hundreds of books on thinking and how to improve it, ranging from airport junk to turgid academic treatises. Here is a short list of some of the best, focusing on critical thinking
Cialdini, R. B. (1984). Influence: The Psychology of Persuasion.
Giere, R. N. (1996). Understanding Scientific Reasoning
Heuer, R. J. (1999). Psychology of Intelligence Analysis.
Kepner, C. H., & Tregoe, B. B. (1997). The New Rational Manager
Minto, B. (1995). The Pyramid Principle: Logic in Writing and Thinking.
Myers, D. G. (2002). Intuition: Its Powers and Perils.
Paul, R. W., & Elder, L. (2002). Critical Thinking: Tools for Taking Charge of Your Professional and Personal Life
Piatelli-Palmarini, M. (1994). Inevitable Illusions: How Mistakes of Reason Rule our Minds.
Salmon, M. (1989). Introduction to Logic and Critical Thinking
Spence, G. (1995). How to Argue and Win Every Time
Whyte, J. (2004) Crimes Against Logic