Dr. Mack's thorough examination and explanation of the effect of Lawrence's childhood on his adult life and mentality is brilliant. Instead of merely stating his opinions, he touches on those of other biographers as well and then proceeds to state how and why he feels they are accurate or inaccurate, providing quotes from military reports, other Lawrence books, interviews with Lawrence's relatives and friends, and Seven Pillars of Wisdom.
If you read A Prince of Our Disorder, I can almost 100% gaurantee that you will have a better understanding of Lawrence's personal role in the Hejaz Campaign and the lasting effects of his experiences in Arabia on him physically and psychologically. Thankfully, it is beautifully written, and not at all confusing.
From the moment Mack "introduces" you to Lawrence you will have a desire to learn more about him, and as Mack walks you through his troubled life, you will feel pity and awe for this untouchable man.
I think that A Prince of Our Disorder clarifies the line between the legend of the indestructable, hero-Lawrence and the lost, soul-searching man Lawrence really was.