The Art of Thinking is a classic self-help book written by Thomas Sharper Knowlson and first published in 1921. The book is a comprehensive guide to developing critical thinking skills and improving one's mental faculties. It covers a wide range of topics, including the nature of thought, the process of reasoning, the principles of logic, and the art of persuasion.The book is divided into four parts. The first part is an introduction to the art of...