Call me a simple man and not in order but here goes:

1st novel I read that I loved and still do.
Where the Red Fern Grows By Wilson Rawls

Intensity by Dean Koontz

The Day of the Triffids By John Wyndham

Three By Ted Dekker

The Chronicles of Narnia (entire series as 1) By C.S. Lewis

The Grapes of Wrath By John Steinbeck

A Man Called Simple By Langston Hughes

Native Son By Richard Wright

Deliverance By James Dickey

The Silence of the Lambs By Thomas Harris

Invisible Man By Ralph Ellison

There are so many others that could be listed, but off the top of my head this is a good start.