I think a subtitle for this book might be: Help. I've Started Doing Research, and I Can't Stop. I imagine the author started out looking up things about Walt Whitman, but ended up learning about Walt's brother George, who was a soldier, retiring at Major, and then all of George's battles, and then the whole Civil War, and the whole Whitman family. There were numerous brothers and sisters, and Mrs. Whitman, the matriarch, held them all together, at the center of a complex web of letter writing. Anything that involves the family gets in the book-- financial difficulties, moves, the background of battles, politics, and friends. It is, therefore, somewhat sprawling. It is something like stepping into a period of time, and falling into its rabbit hole.
There was lots of interesting stuff here. This book addresses the issue of Walt's sexuality more head-on than other books I have read about him. He apparently cruised the city looking for young men, and wrote down their names and salient details in a notebook.
There is great detail about Walt's work in the hospitals. I had previously heard it said that Walt was a nurse in the Civil War. He would assist with procedures when needed, but he was more of a friendly visitor, bringing soldiers little gifts, writing letters for them, and sitting with them. This was an act of charity, certainly, but it also served his fascination with beautiful young men.
Brother George's unit, the 51st, fought in most of the major battles of the war. George was wounded at Fredericksburg, and Walt came to check on him, which was how he got started visiting in the hospitals. George was healed, and went back. There is much description of George's battles, where he experienced amazing luck, having bullet holes shot through his coat, but never being killed. Eventually he was taken prisoner, and the whole Whitman family rallied to plead (successfully) for his release. So there is then a discussion of the conditions in Civil War prison camps.
The end of the book is about the death of Lincoln, and how Walt put that into his poetry.
We tend to think of great poets, and other great artists, as men who work in glorious isolation. It is good to see a great man in the complexity of his natural habitat, loving and beloved of many. Walt Whitman was what he was, and his mother, and brothers, and sisters, and friends were all a part of making him what he was.