Here are some links to assist you -
Amazon US
www.amazon.com/Ujahwek-ebook/dp/B008LKE8UE/
Amazon UK
http://www.amazon.co.uk/dp/B008LKE8UE
John A. Karr's author page on Amazon
http://www.amazon.com/John-A.-Karr/e/B003DVNQ8G/
Barnes & Noble
http://www.barnesandnoble.com/w/ujahwek-john-a-karr/1112117588?ean=2940014622219
Listopia list - Weird Westerns
http://www.goodreads.com/list/show/3897.Weird_Westerns