Here is an eBook found at WorldCat.

http://www.worldcat.org/title/war-childs-children-the-story-of-the-third-regiment-arkansas-cavalry-confederate-states-army/oclc/709526171/editions?referer=di&editionsView=true

And for sale at:

http://www.abebooks.com/servlet/SearchResults?sts=t&tn=The+War+Child%27s+Children%3A+The+Story+of+the+Third+Regiment