His writing is influenced both by his long Oklahoman and Native American heritage as well as by national and international topics including cultural , political , and social issues .
After a life - threatening illness in the year 2000 Roberts decided to publicly share his work .
Roberts ' writing is influenced both by his long Oklahoman and Native American heritage as well as by national and international topics including cultural , political , and social issues .
After a life - threatening illness in the year 2000 Roberts decided to publicly share his work .