Titles I recommend by Oklahomans (* indicates that I have read the title)
Where the Heart Is* :: Billie Letts {1995}
Pryor Rendering* :: Gary Reed {1996}
The Outsiders* :: S.E. Hinton {1967}
Still Life Moves* :: Jeff Martin {2003}
Where the Red Fern Grows* :: Wilson Rawls {1961}
Route 66: the Mother Road :: Michael Wallis {2001}

Titles I recommend about Oklahoma

The Grapes of Wrath :: John Steinbeck {1939}

Oklahoman authors I recommend
P.C. Cast
Billie Letts
S.E. Hinton
Wilma Mankiller
William Berhardt
Louis L’Amour
C.J. Cherryh
Tony Hillerman
Ralph Waldo Ellison
N. Scott Momaday
Carolyn Hart