Deep work by Cal Newport is a must read for all knowledge workers.
The author starts the book with defining deep work and contrasts it with shallow work. Then he goes on to establish that for most of the knowledge workers deep work is vital for success. Being a researcher he backs his conclusion with data points and explores the value of shallow work as well. After that the author provides a set of advice and techniques to pursue deep work.
Some books leave a lasting impact on you and Deep work is one such book for me. I have made up my mind to pursue deep work and avoid shallow work in my life.