The story of how Twain helped Grant publish his memoirs has been told elsewhere, but gets more detail here. More interesting is the book’s account of how Grant helped Twain.
‘My Dearest Julia: The Wartime Letters of Ulysses S. Grant to His Wife’
Eighty five letters from Ulysses S. Grant to Julia before and after their marriage demonstrate the deep love between the two and show Grant’s maturation from awkward young man to confident general.
‘Mrs Grant and Madame Jule’ by Jennifer Chiaverini
A novelist imagines how Julia Grant’s real-life enslaved maid Jule might have felt about slavery, freedom, the Civil War, and the romance of Julia and Ulysses S. Grant.