If you want a book explaining 4 Christian views on war, check out 'War: Four Christian Views', edited by Robert G. Clouse. You can read a little more about it here:

http://www.amazon.com/exec/obidos/tg/detail/-/0830813098/102-5136701-8222548?v=glance

The editorial review states that:

"Robert Clouse presents four different viewpoints on war: Herman Hoyt on biblical nonresistance, Myron Augsburger on Christian pacifism, Arthur Holmes on just war, and Harold O.J. Brown on preventive war."

Clearly the whole idea of a 'just war' is not the only Christian option available.