Flatland 
by Edwin Abbott

Sphereland 
by Dyonis Burger

The Ghost from the Grand Banks 
by Arthur C. Clarke

The Incomplete Enchanter 
by De Camp, L. Sprague

Wall of Serpents 
by De Camp, L. Sprague

Occam's Razor 
by Dave Duncan

Dark Integers... 
by Greg Egan

The Number Devil 
by Hans Magnus Enzenberger

Fantasia Mathematica 
edited by Cliffor Fadiman

The Mathematical Magpie 
edited by Cliffor Fadiman

 

 Voices in the Light 

by Sean McMullen

Napier's Bones 
by Derryl Murphy

"The Mathematical Voodoo" 
by H. Nearing

The Integral Trees 
by Larry Niven

Inverted World 
by Christopher Priest

The Memory of Whiteness 
by Kim Stanley Robinson

The Secret of Life 
by Rudy Rucker

The Sex Sphere 
by Rudy Rucker

White Light 
by Rudy Rucker

Mathenauts: Tales of Mathematical Wonder 
edited by Rudy Rucker

Distances 
by Vandana Singh

"What Dead Men Tell" 
by Theodore Sturgeon

Neverness 
by David Zindell

Physics / Space and time / Fourth Dimension

The Practice Effect
by David Brin

Mission of Gravity 
by Hal Clement

Into the Fourth Dimension 
by Ray Cummings

Dragon's Egg 
by Robert Forward

Celestial Matters 
by Richard Garfinkle

"The xi effect" (short story) 
by Philip Latham

The Life of Space 
by Maurice Maeterlink

The Dimensioneers 
by Doris Piserchia

Spaceland 
by Rudy Rucker

Mathematicians

The Last Theorum
by Arthur C. Clarke

Logicomix (graphic novel) 
by Apostolos Doxiades

Mathematicians in Love 
by Rudy Rucker

Dark as Day 
by Charles Sheffield

7 Steps to Midnight 
by Richard Matheson

The Hollow Man 
by Dan Simmons