I got the list of these books from the selected bibliography of the 48 Laws of Power and linked the titles to places on the internet where they could be found. For the majority of these books I linked right to the Amazon page because they aren't very popular and still under copyright so finding them on the web for free was a no go. However, for many of the books I did link the free text or audio versions because they are classics that belong to the public domain. I don't think I'm going to go through this whole list and read everything myself but if you're up to the challenge by all means dive in.
Fables of Aesop by Aesop
The Chinese Machiavelli by Dennis Bloodworth and Ching Ping
Cheating: Deception in war & magic, games & sports, sex & religion, business & con games, politics & espionage, art & science by J. Barton Bowyer
The Book of the Courtier by Baldesar Castiglione
On War by Carl von Clausewitz
The Court Society by Norbet Elias.
The Power of the Charlatan by Grete de Francesco (try your local libraries for this one it's apparently hard to come by).
The Power Tactics of Jesus Christ and Other Essays by Jay Haley
The Complete Works of Han-fei-tzu by Han-fei-tzu
I linked the basic writings because the book was out of print.
The Histories by Herodotus. Free audio book here: Librivox
Kissinger: A Biography by Walter Issacson
Selected Fables by Jean de La Fontaine
Life, Letters and Epicurian Philosophy of Ninon de Lenclos, The Celebrated Beauty of the 17th Century by Ninon de Lenclos.
Bismarck: The Story of a Fighter by Emil Ludwig.
The Prince and The Discourses by Niccolo Machiavelli.
Selected Military Writings of Mao Tse-tung by Mao Tse-tung.
Monstrous Regiment: Women Rulers in Men's Worlds by Betty Milan.
The Complete Essays by Michel de Montaigne.
The Art of Winning Wars by Col. James Mrazek.
Hustlers and Con Men by Jay Robert Nash.
The Birth of Tragedy and On the Genealogy of Morals by Friedrich Nietzsche.
Talleyrand: The Art of Survival by Jean Orieux.
Makers of Rome and The Rise and Fall of Athens by Plutarch.
Foxes and Lions: Machiavelli's Confidence Men by Wayne A. Rebhorn.
Memoirs of Jean Francois Paul de Gondi, Cardinal de Retz by Cardinal de Retz.
Cha-no-yu: The Japanese Tea Ceremony by A.L. Sadler.
Amoral Politics by Ben-Ami Scharfstein.
Mirrors, Masks, Lies, and Secrets by Karl E. Scheibe.
The Wisdom of Life and Counsels and Maxims by Arthur Schopenhauer.
The Book of Stratagems: Tactics for Triumph and Survival by Harro von Senger.
The Craft of Power by R.G.H. Siu.
The Art of War by Sun-tzu.
The History of the Peloponnesian War by Thucydides.
Ways of Lying: Dissimulation, Persecution, and Conformity by Perez Zagorin.
The Con Game and "Yellow Kid" Weil by "Yellow Kid" Weil.