There is no exhaustive list that will make one a strong person. It is a life long pursuit of discipline, exploration, trial and error.
Start with researching what you think the model of a strong person is, who you have in mind that you think is worthy to emulate, and see what they've read.
You'll get a varying list of recommendations from us but you can always start with ancient philosophers from both the west and the east (think Plato, Aristotle, Confucius, Sun Tzu, Marcus Aurelius, etc.) up to the Enlightenment to contemporary. Read the classic standard histories of civilizations and then try some different perspectives. Read economics and political and social philosophies - again, from varying perspectives.
There is no sequence of books that is right or wrong but focus on books that have stood the test of time that are touted by the people who you look up to...