Roland's biography of Johnston is considered a classic of the genre and it is clear why. The book is well written and fair to its subject. It helps that Johnston left a heap of personal letters that allowed Roland to reconstruct the man. The most surprising part was Johnston's scholarly and artistic pursuits. He translated Sallust and tried to learn the flute. It is also odd for a biography of a Civil War general in that most of the book takes place before the fighting. Which makes perfect sense. Johnston was 60 when he died, old for a field commander. He also died when the war was not yet a year old. He had already seen service in the Black Hawk War, Mexican-American War, and Utah Expedition, not to mention his command of the Texan army.
The book is also a fossil. Johnston is portrayed as courageous, honorable, and nearly above personal reproach. On that later point though Johnston is an easy villain in 2020. While not a cruel slave-owner (he refused to whip a slave who stole thousands of dollars) he was opposed to emancipation and thought the free people of color needed to be removed. Of the natives he favored hard war and he held the Mexicans in near total contempt. His virtues of honor, courage, and reticence were noted by all, but in his broad worldview he is better suited to a time when conquest and exploitation were taken as permanent forces in human affairs. He would have been a Roman of renown if he had somehow been born in the days of the republic. That said, his heroic death, and the host of personal admirers, many within the Union army, still give him a glow of sorts.