This is a very, very wordy book. Also, all the historical name throwing might be interesting to history buffs, but is unneeded. If you say you are in the west during the days of cowboys and Indians, I will believe you. Both of these elements hurt your book and makes you look like you're trying to show off. A reader doesn't care how vast your knowledge of the old west is, all she wants is a good story.
There are a few typos, such as a random comma, and a few sentences that start with conjunctions. On top of that, there is so much narration in this. Even when we finally have another person with the main character, all we get is more narration. I'd really like to see character interaction, as opposed to being told that it happened.
Redundancies are also an issue. Take this sentence for example:
'"Don't care much about the bank," said Eddie. "Our money goes right back into bread, bacon, and eggs— and windows," he added. "We are running down a railroad track, and if we stop we'll get run right over by a freight train," Eddie said.'
Author, I know who's talking here. You don't need to inform me that it's the same person after every sentence he says.
It's interesting to see a book talk about segregation, since it was a fact of life back then. I often forget that, likely because we live in a day and age where racism isn't tolerated.
While it might be due to the fact that I simply don't read westerns, I find this an odd turn of phrase:
"It was the boy in the lead that had been the talker. He was a tall, lean drink of water..."
'Drink of water'? What does that mean? This is the problems with using metaphoric phrases, some are strictly regional while others often become archaic. When writing a period piece, it's important to insure that a reader understands your metaphor by using other information to determine what it means without too much guess work. Honestly, you could avoid it all together and just take the phrase out and it wouldn't hurt the sentence.
There's also reference to a 'double barreled choke bore Greener,' which I have no idea what that is, save that it must be some kind of gun. Perhaps an early shotgun. I'm sure it's super neat to write about weapons used in the Wild West, but unless you're only writing this book for gun fans, you need to tell the average reader a bit more about it.
Despite these problems, I liked Gunfighter's Justice and can easily recommend it to any western fan. To anyone who isn't a western fan, pick it up. There's nothing here that will alienate you from an interesting tale and you will enjoy it.