Here are the sources used in the making of this show. All of them have links to Amazon. Should you purchase any of these books though here it supports the show.

Allexander the Great by Arrian

One Bullet Away by Nathaniel Fick

On War by Carl von Clausewitz

On Killing by Dave Grossman

What it's like to go to war by Karl Marlantes

The Prince

The Crusades

The Crusader Sates by Malcom Barber

Ibn Al Athir Part 1

Ibn Al Athir Part 2

Medieval Warrior by Martin Dougherty

Chronicle of the First Crusade by Christopher Tyreman

Fuedal Monarcrhy in the Latin Kingdom of Jerusalem by John La Monte

Chronicle of the Third Crusade by Helen Nicholson

The Crusades by Thomas Asbridge

Armies of Heaven by Jay Rubestien

Concise History of the Crusades by Thomas Madden

God's Battalions by Rodney Stark