T.E. Lawrence's
Seven Pillars of Wisdom. He became close with George Bernard Shaw and you can read the influence in his writing. The book can be read on-line for free here:
http://www.wesjones.com/lawrence1.htm
A brief example:
Eventually Clayton was driven out of the General Staff; and Colonel Holdich, Murray's intelligence officer at Ismailia, took his place in command of us. His first intention was to retain my services; and, since he clearly did not need me, I interpreted this, not without some friendly evidence, as a method of keeping me away from the Arab affair. I decided that I must escape at once, if ever. A straight request was refused; so I took to stratagems. I became, on the telephone (G.H.Q. were at Ismailia, and I in Cairo) quite intolerable to the Staff on the Canal. I took every opportunity to rub into them their comparative ignorance and inefficiency in the department of intelligence (not difficult!) and irritated them yet further by literary airs, correcting Shavian split infinitives and tautologies in their reports.