The One Thing by Gary Keller with Jay Papasan
Essentialism by Greg McKeown
Willpower by Roy Baumeister & John Tierney
The Power of Habit by Charles Duhigg
Influence by Robert Cialdini
The 80/20 Principle by Richard Koch
80/20 Sales & Marketing by Perry Marshall
I have several on my shelf to read, but three of them stand out especially.
They are:
Smarter, Faster, Better by Charles Duhigg
Deep Work by Cal Newport
High Performance Habits by Brendon Burchard