The Personal Memoirs of Ulysses S. Grant is an autobiography of American President Ulysses S. Grant, focused mainly on the general's actions during the American Civil War. Written as Grant was dying of throat cancer in 1885, the two-volume set was published by Mark Twain shortly after Grant's death. The memoirs were a financial and critical success and are still praised for their high literary qualities.
After finishing his second term in office in 1877, Grant and his wife Julia took a trip around the world which left him short on money. Nearly 60, the ex-president looked for something to engage his time. He ran for the Republican nomination for president in 1880, but lost to James Garfield. The next year, Grant moved to New York City to go into business with his son, Ulysses S. Grant, Jr., and a young investor, Ferdinand Ward, described by his great-grandson Geoffrey Ward as "a very plausible, charming, unobtrusive, slender person with a genius for finding older people and pleasing them, which he learned early on."
The firm of Grant & Ward did well at first, bolstered by Ward's skills and Grant's name. The former president bragged to friends that he was worth two and a half million dollars, and family members and friends poured money into the firm. But Grant was largely disengaged from the company's business, often signing papers without reading them.
This proved disastrous, as Ward had used the firm as a Ponzi scheme, taking investors' money and spending it on personal items, including a mansion in Connecticut and a brownstone in New York City. Grant & Ward failed in May 1884, leaving Grant penniless.
That fall, the former president was diagnosed with terminal throat cancer. Facing his mortality, Grant struck a publishing deal with his friend Mark Twain and began working on his memoirs, hoping they would provide for his family after his death.
Grant suffered greatly in his final year. He was in constant pain from his illness and sometimes had the feeling he was choking. Despite his condition, he wrote at a furious pace, sometimes finishing 25 to 50 pages a day. In June 1885, as the cancer spread through his body, the family moved to Mount MacGregor, New York, to make Grant more comfortable. Propped up on chairs, and too weak to walk, Grant worked to finish the book. Friends, admirers and even a few former Confederate opponents made their way to Mount MacGregor to pay their respects. Grant finished the manuscript on July 18; he died five days later.
The Memoirs are divided into two volumes. The autobiography is unusual but not unique in that large sections of Grant's life (most notably, his childhood and his presidency) are given brief mention or not discussed at all. The focus of the book is Grant's military career—his service in the Mexican-American War and the Civil War.
Grant's writing has been praised for its conciseness and clarity—a sharp contrast from contemporary Civil War memoirs, which tended to reflect the Victorian fondness for elaborate (and sometimes overblown) language.
With regard to the U.S.-Mexican War, Grant recorded his belief that it had been waged unjustly:
Generally, the officers of the army were indifferent whether the annexation was consummated or not; but not so all of them. For myself, I was bitterly opposed to the measure, and to this day regard the war, which resulted, as one of the most unjust ever waged by a stronger against a weaker nation. It was an instance of a republic following the bad example of European monarchies, in not considering justice in their desire to acquire additional territory. 
His account of Lee's surrender at Appomattox Court House is particularly notable:
When I had left camp that morning I had not expected so soon the result that was then taking place, and consequently was in rough garb. I was without a sword, as I usually was when on horseback on the field, and wore a soldier’s blouse for a coat, with the shoulder straps of my rank to indicate to the army who I was. When I went into the house I found General Lee. We greeted each other, and after shaking hands took our seats. I had my staff with me, a good portion of whom were in the room during the whole of the interview.
What General Lee’s feelings were I do not know. As he was a man of much dignity, with an impassible face, it was impossible to say whether he felt inwardly glad that the end had finally come, or felt sad over the result, and was too manly to show it. Whatever his feelings, they were entirely concealed from my observation; but my own feelings, which had been quite jubilant on the receipt of his letter, were sad and depressed. I felt like anything rather than rejoicing at the downfall of a foe who had fought so long and valiantly, and had suffered so much for a cause, though that cause was, I believe, one of the worst for which a people ever fought, and one for which there was the least excuse. I do not question, however, the sincerity of the great mass of those who were opposed to us ...
We soon fell into a conversation about old army times. He remarked that he remembered me very well in the old army; and I told him that as a matter of course I remembered him perfectly, but from the difference in our rank and years (there being about sixteen years’ difference in our ages), I had thought it very likely that I had not attracted his attention sufficiently to be remembered by him after such a long interval. Our conversation grew so pleasant that I almost forgot the object of our meeting. After the conversation had run on in this style for some time, General Lee called my attention to the object of our meeting, and said that he had asked for this interview for the purpose of getting from me the terms I proposed to give his army.
Grant also makes asides to clear up legends that had grown up around his leadership. After dismissing one tale, Grant wrote "Like many other stories, it would be very good if it were only true."
The narrative ends shortly after the Army of the Potomac's final review in Washington in May 1865. Grant deliberately avoids comment on Reconstruction, apart from saying that he favored black suffrage. The final chapter, "Conclusion," is a reflection on the war and its effects, the actions of foreign countries during it, and the reconciliation of North and South. In the final paragraphs, Grant makes note of his own condition and expresses optimism that "Federal and Confederate" can live together.
I cannot stay to be a living witness to the correctness of this prophecy; but I feel it within me that it is to be so. The universally kind feeling expressed for me at a time when it was supposed that each day would prove my last, seemed to me the beginning of the answer to "Let us have peace."
The expression of these kindly feelings were not restricted to a section of the country, nor to a division of the people. They came from individual citizens of all nationalities; from all denominations—the Protestant, the Catholic, and the Jew; and from the various societies of the land—scientific, educational, religious or otherwise. Politics did not enter into the matter at all.
I am not egotist enough to suppose all this significance should be given because I was the object of it. But the war between the States was a very bloody and a very costly war. One side or the other had to yield principles they deemed dearer than life before it could be brought to an end. I commanded the whole of the mighty host engaged on the victorious side. I was, no matter whether deservedly so or not, a representative of that side of the controversy. It is a significant and gratifying fact that Confederates should have joined heartily in this spontaneous move. I hope the good feeling inaugurated may continue to the end.
The press and public followed Grant's symptoms throughout his final year, and his work on the book was well-known. While interest in his memoirs would have been high had Grant not been ill, his struggle to finish it before his death gave it even more attention.
On release, the book received universal critical praise. Twain compared the Memoirs to Julius Caesar's Commentaries. Matthew Arnold praised Grant and his book in an 1886 essay. Twain, however, felt Arnold's tone was condescending to both Grant and the United States, and the two authors feuded until Arnold's death in 1888. Gertrude Stein also admired the book, saying she could not think of Grant without weeping. The Memoirs quickly became a best seller. The Grant family, who received 75 percent of the royalties, made approximately $450,000 from the book, re-establishing their fortune.
Mark Twain's opinion
"I had been comparing the memoirs with Caesar's Commentaries... I was able to say in all Apologetic forms that the same high merits distinguished both books - clarity of statement, directness, simplicity, manifest truthfulness, fairness and justice toward friend and foe alike and avoidance of flowery speech. General Grant was just a man, just a human being, just an author...The fact remains and cannot be dislodged that General Grant's book is a great, unique and unapproachable literary masterpiece. There is no higher literature than these modest, simple Memoirs. Their style is at least flawless, and no man can improve upon it."
- Grant, Ulysses S., Personal Memoirs of U. S. Grant, Charles L. Webster & Company, 1885–86, ISBN 0-914427-67-9.