He has written books about the wars in Afghanistan (both with the Soviet Union, and the war in 2002) and the 2003 Iraq War, as well as books about Colorado, the Western United States, and extreme sports such as mountain climbing.
The author penned works on the wars in Afghanistan (including those with the Soviet Union and the 2002 conflict) and the 2003 Iraq War, along with books on Colorado, the Western United States, and extreme activities such as mountaineering.