I have a hard time coming up with 10 because there are so many that are in such close comparison. The top 3 are clear in my mind. The rest are what comes immediately to mine, but I know I'm missing many others that equally qualify. In fact of the 7 after Riddley Walker, I'm not even entirely sure of the order.

The Sot-weed Factor (John Barth)
Gravity's Rainbow (Thomas Pynchon)
Riddley Walker (Russell Hoban)
Stranger in a Strange Land (Robert Heinlein)
Cryptonomicon (Neal Stephenson)
Even Cowgirls Get the Blues (Tom Robbins)
Slaughterhouse Five (Kurt Vonnegut)
Ringworld (Larry Niven) - and thinking of Niven, The Mote In God's Eye (Niven and Jerry Pournelle)
Odd Thomas Trilogy (Dean Kuntz)
Caught in the Light (Robert Goddard) - I picked this one really only because it was the first one by him that I'd read.


>One Lonely Night (Mickey Spillane)
>Atlas Shrugged (Ayn Rand)
>We The Living (Ayn Rand)
>Fountainhead (Ayn Rand)
>The Man Who Laughs (Victor Hugo)
>Breakfast of Champions (Vonnegut)
>Good Times/Bad Times (James Kirkwood...I'll be very happy if anyone else has read this)
>Peer Gynt (Ibsen)
>Complete Book of Short Stories (O. Henry)
>No Comebacks (Forsythe)
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>Honorable mention: Think Twice (unpublished Ayn Rand play), Cat's Cradle (Vonnegut)