The 5 Elements of Effective Thinking is small and up to the point, can be easily read in days. I found the book insightful. In it authors, Burger and Starbird reveal the hidden powers of deep understanding (earth), failure (fire), questions (air), the flow of ideas (water), and the quintessential element of change that brings all four elements together.
It is a book which can be read multiple times and you can improve yourself. There are exercises at the end of each concept which will help you to take actions in your life.
I enjoyed this book, hope you like it as well, let me know your viewpoints in comments below.