"Not all readers are leaders, but all leaders are readers." - President Harry S. Truman
That quote is extremely true. The list of books below are all titles that I own and personally endorse. Each book is well worth your time.
Disclaimer: I do NOT earn any kickbacks on the sales of these books at all. These are strictly product links.
Talking to Strangers: What We Should Know About the People We Don't Know, Malcom Gladwell
Extreme Ownership: How US Navy Seals Lead and Win, Jocko Willink and Leif Babin
Start With Why, Simon Sinek
The Phoenix Project: A Novel About IT, DevOps, and Helping Your Business Win, Gene Kim, Kevin Behr, and George Spafford
The Total Money Makeover, Dave Ramsey
Poke the Box, Seth Godin
7 Habits of Highly Effective People, Dr. Stephen Covey
12 Rules for Life: An Antidote for Chaos, Dr. Jordan B. Peterson
Notes from the Underground, Fyodor Dostoevsky
The Five Dysfunctions of a Team: A Leadership Fable, Patrick Lencioni
The Federalist Papers, Alexander Hamilton, James Madison, and John Jay
One Day in the Life of Ivan Denisovich, Aleksandr Solzhenitsyn
The Gulag Archipelago, Aleksandr Solzhenitsyn
Othelo, William Shakespeare
Romeo and Juliet, William Shakespeare
The Great Gatsby, Francis Scott Fitzgerald
The Adventures of Tom Sawyer, Mark Twain
1984, George Orwell
The Lord of the Rings, J.R.R. Tolkien
The Last Wish (The Witcher), Andrezej Sapkowski
The Grapes of Wrath, John Steinbeck
The Chronicles of Narnia, C.S. Lewis
The Lord of the Flies, William Golding
Moby Dick, Herman Melville
Peter Pan, J.M. Barbie
Fahrenheit 451, Ray Bradbury