Shelby Foote — American Author born on November 17, 1916, died on June 27, 2005

Shelby Dade Foote, Jr. was an American historian and novelist who wrote The Civil War: A Narrative, a massive, three-volume history of the war. With geographic and cultural roots in the Mississippi Delta, Foote's life and writing paralleled the radical shift from the agrarian planter system of the Old South to the Civil Rights era of the New South. Foote was relatively unknown to the general public for most of his life until his appearance in Ken Burns's PBS documentary The Civil War in 1990, where he introduced a generation of Americans to a war that he believed was "central to all our lives". Foote did all his writing by hand with an old-fashioned nib pen, disdaining the typewriter... (wikipedia)

And I really do think that the difficulty of research makes it more real to you than punching a thing to find out how many men were killed at this particular action.
I'm crazy about Grant: his character, his nature, his science in fighting and everything else. But I don't like the idea that he never accepted the blame for anything, always found someone else to blame for any mistake that was ever made, including blaming Prentiss for Shiloh.
I think making mistakes and discovering them for yourself is of great value, but to have someone else to point out your mistakes is a shortcut of the process.
Shiloh is a wonderfully dramatic battle. The leader of one side is killed, and the other one is going on to glory, and it was the first great battle. It lasted two days.
My second book, Follow Me Down had some success, got good critical notices, went into a second printing and things like that, but Shiloh was by far the most successful of those first five novels.