Here's a list of books I found helpful when reflecting upon my recent burnout. Very similar thoughts around lack of purpose, lack of direction at work, common disruptions at work leading to not being able to work deeply. And much more.

Transcend: The New Science of Self-Actualization by Scott Barry Kaufman

Why We Sleep by Matthew Walker

An Elegant Puzzle by Will Larson

Inspired / Empowered by Marty Cagan

Build What Matters by Ben Foster

High Output Management by Andy Grove

The Effective Executive by Peter Drucker

Much by Cal Newport (Deep Work / A World Without Email / etc)