"Secular" Books which had an impact on me:

Autobiography of Malcolm X

Home (a play about a negative utopia of over population)

The Time Machine H.G. Wells

Anton Bruckner's Symphony # 9 (oops - not exactly a book.)

Bergman, Trout
Derrida, Dissemination
Walton, The Compleat Angler
Miles, Hippie
LaFontaine, Caddisflies
Winter, Kings, Commoners, and Knaves
Schullery, Royal Coachman
Deloria, Custer Died for your Sins
Maclean, A River Runs Through It
Vizenor, Bearheart: The Heirship Chronicles
Gierach, Death, Taxes, and Leaky Waders