Classicly

The Great Boer War is a non-fiction work on the Boer War by Arthur Conan Doyle and first published in 1900 by Smith, Elder & Co. By the end of the war in 1902 the book had been published in 16 editions, constantly revised by Doyle.

Preface from the book:

During the course of the war some sixteen Editions of this work have appeared, each of which was, I hope, a little more full and accurate than that which preceded it. I may fairly claim, however, that the absolute mistakes made have been few in number, and that I have never had occasion to reverse, and seldom to modify, the judgments which I have formed. In this final edition the early text has been carefully revised and all fresh available knowledge has been added within the limits of a single volume narrative.