My dad's uncle, Josiah Spikes, enlisted at Union Springs, Alabama in the 8th, in 1862, along with some of his relatives and friends. He was the only man named Spikes listed on the surrender rolls at Appomattox.
I asked Ms. Green the reason for omitting his name as a member of the 8th in her study. Her reply was caustic and combative. She said that it was because no one named Josiah Spikes served in the 8th. This would surprise his still-living grand daughters, with whom he resided in old age, as well as his siblings, parents, and comrades in the 8th with whom he served. Ms. Green snapped that "J.S. Spikes referred to "James Spikes".
There was no one in our family named James. Josiah had divided his name, as did my father after him, into two names: Joe, and Siah. He was called "Siah" ,but as he and his kinsmen were for the most part illiterate, he name was pronounced "Sarr". His father, Mathew, was in the 50th Alabama Cherokee Rifles.
As to Hilary Hebert, I do not know of his personality, but he wrote a some things that were innocently incorrect or simply contrary to fact. He should have known better, as he was an officer in the 8th. He stated, for instance, that Josiah was AWOL from roll call on two occasions, and inferred that he was twice a deserter. I researched the two dates, and found that, in the first, Josiah was captured after being wounded near the eye on the 2nd day of fighting at Gettysburg, and had been taken as prisoner to Fortress Monroe in Baltimore. (His grand daughters told me that he carried that bullet on his person until the day he died.) He was exchanged, and was returned to his unit.
On the second occasion of not answering the roll, he in the hospital in Danville, Virginia, after having been shot in the shoulder at the Battle of the Wilderness. He was nevr a deserter, and he was certainly no liar. He was very religious, and a person of endearing character.
I love to prove liars wrong, and to do justice to those they villify.
I hope you find what you are looking for, but if I were you, I would depend upon independent research more than I would the writings of Green or Hebert.