8 Books on Focus To Improve Your Concentration.

Focus: The Hidden Driver of Excellence by Daniel Goleman.

The One Thing by Gary Keller.

The 80/20 Principle: The Secret to Achieving More with Less by Richard Koch.

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Free to Focus: A Total Productivity System to Achieve More by Doing Less by Michael Hyatt.

The Compound Effect by Darren Hardy.

Eat that Frog by Brian Tracy.

Deep Work: Rules for Focused Success in a Distracted World by Cal Newport.

Essentialism by Greg McKeown.