In learning sectors, content is everywhere, not only in the classroom. Reading should not be limited to the classroom. Most of the books recommended below are self-improvement books.
Atomic Habits by James Clear
The 10x Rule by Grant Cardone
The Compound Effect by Darren Hardy
The Dip by Seth Godin
Think & Grow Rich by Napoleon Hill
Peak by Anders Ericsson and Robert Pool
Mindset by Dr. Carol S. Dweck
Grit by Angela Duckworth
The Obstacle is the Way by Ryan Holiday
Creativity Inc. by Amy Wallace and Edwin Catmull
The Art of Possibility by Benjamin Zander and Rosamund Stone
Linchpin by Seth Godin
Why We Sleep by Matthew Walker