1. World War I - Gerald DeGroot
Barnesy has mentioned this topic and this appears to be the best, compact WWI summary available. It’s expensive new (because it’s awesome) so I would prob go with a “pre-owned”. pp 240
http://www.amazon.com/First-World-War-Twentieth-Century-Wars/dp/0333745353
2. The Gnostic Gospels, Elaine Pagels
A clear, cogent, and very effective introduction to the subject of Gnosticism, a different form of Christianity that was declared heretical and virtually stamped out by the orthodox church by the start of the second century after Christ. Most of what we knew of the Gnostic belief system came from the religious authors who worked so hard to destroy the movement, but that changed drastically with the still relatively recent discovery of a number of lost Gnostic writings near Nag Hammadi in Upper Egypt (like Dead Sea scrolls). pp 224
http://www.amazon.com/Gnostic-Gospels-Elaine-Pagels/dp/0394502787/ref=cm_srch_res_rpli_1
3. God and Man at Yale - William F. Buckley
Classic - though I’m sure I’ll have my doubts… pp 300
http://www.amazon.com/God-Man-At-Yale-Anniversary/dp/089526692X/ref=sr_1_1?s=books&ie=UTF8&qid=1283167327&sr=1-1
4.The Best and Brightest - David Halberstam
This would prob be my #1 choice - though it is 700 pages, so understand if we want to eliminate it. Quite a description here and largely considered the best book on the background to and decisions during the Vietnam War
http://www.amazon.com/Best-Brightest-David-Halberstam/dp/0449908704/ref=cm_srch_res_rpli_1