One word says it all...

Single word titles that are not a proper noun

Bitten by Kelley Armstrong
Coma by Robin Cook
Next by Michael Crichton
Passage by Connie Willis
Space by James Michener

Mercy by Jodi Picoult
Once by Morris Gleitzman
Tsotsi by Athol Fugard
Soho by Keith Waterhouse
Birdsong by Sebastian Faulks

Shoes, by Elizabeth Cotton
Jewelry
Fans, by Rosalie Wells
Scarpe, by Linda O'Keeffe
Kosode, by Iwao Nagasaki

Hmm, I sense a theme: Fashion, by Kyoto Costume Institute

This one is easier than I thought...

Surfacing by Margaret Atwood
Ficciones by Jorge Luis Borges
Gossip by Christopher Bram
Providence by Anita Brookner
Bingo by Rita Mae Brown

...and that doesn't even get me to the end of the B's in my library.
Tip: anyone having trouble with this one, try Henry Green!

For a fan of Ed Mcbain's 87th Precinct novels, that's dead easy. I picked the shortest ones.

Ax
Doll
Heat
Ice
Kiss

Castleview by Gene Wolfe
Outlander by Diana Gabaldon
Chaos by James Gleick
Hyperion and Endymion by Dan Simmons
Tigana by Guy Gavriel Kay
Islandia by Austin Tappan Wright

Greenwitch, Susan Cooper
Dragonworld, Byron Preiss
Junior Jedi Knights: Promises, Nancy Richardson (couldn't get the correct touchstone without putting the series name)
Lost, Gregory Maguire
Traitor, Matthew Woodring Stover

classics...
1984 by george orwell
emma by jane austen
walden by henry david thoreau
odyssey by homer
pnin by vladimir nabokov

politics...
politics by aristotle
utopia by thomas more
utilitarianism by john stuart mill
anthem by ayn rand
erewhon by samuel butler

fiction...
siddhartha by herman hesse
dune by frank herbert
falconer by john cheever
shogun by james clavell
aztec by gary jennings

miscellaneous...
identity by henry harris (icky touchstone)
philebus by plato
night by elie wiesel
vagueness by timothy williamson
ethics by dietrich bonhoeffer

Finn - Katharine Jay Bacon
Chrysalis - David Niall Wilson
Orientalism - Edward Said
Freakonomics - Steven Levitt
Crescent - Diana Abu-Jaber

Heyday - W.M. Spackman
Crackpots - Sara Pritchard
Asylum - Patrick McGrath
Veil - George Chesbro
Harbor - Lorraine Adams

Trawler - Redmond O'Hanlon
Naked - David Sedaris
Iberia - James Michener
Journeys - Jan Morris
Locations - Jan Morris

Palimpsest - Meg Atkins
Savages - Joe Kane
Istanbul - Orhan Pamuk
Scarlett - Alexandra Ripley
Plexus - Henry Miller

Cut by Patricia Mccormick
Speak by Laurie Halse Anderson
Microthrills by Wendy Spero
Infidel by Ayaan Hirsi Ali
Mahu by Neil S. Plakcy (not a proper noun)

Middlemarch - George Eliot
Rebecca - Daphne Du Maurier
Caravans - James Michener
Headhunter - Timothy Findley
Exodus - Leon Uris

Kim - Rudyard Kipling
Alaska - James Michener
Buddenbrooks - Thomas Mann
Voices - Ursula LeGuin
Sybil - Flora Rheta Schreiiber

Cod
Alligator
Giraffe
Beasts
Awakening

Restlessness
Fury
Wicked
Cocksure
Snow

Seeing
Blindness
Away
Rerun
Distance

Reconciliation
Unstolen
Intimacy
Limitations
Rockbound

Faithful
Couples
Sideways
Self
Housekeeping

Callgirl
Brothel
Aloft
Gaffer
Blink

Collapse
Nausea
Love
Adultery
Checkpoint

Runaway
Jihad
Swimming
Longitude
Middlesex

Rowan by Robin McKinley
Quicksand by John Brunner
Mutants by Isaac Asimov (ed)
Juniper by Monica Furlong
Earth by David Brin
Page by Tamora Pierce
Squire by Tamora Pierce
Sunshine by Robin McKinley

Turnabout by Margaret Peterson Haddix
Messenger by Lois Lowry
Sanctuary by Meg Cabot
Firesong by William Nicholson
Firewing by Kenneth Oppel

All by Dick Francis

Nerve
Bolt
Proof
Decider
Shattered

Arithmetic
Aureole
Beauty
Chocolat
Comeback

Thriller edited by James Patterson
Widdershins by Charles de Lint
Pyramids by Terry Pratchett
Lo! by Charles Fort
It by Stephen King

Blindness - Jose Saramago
Mercure - Amelie Nothomb
Kitchen - Banana Yoshimoto
Ignorance - Milan Kundera
Silk - Alessandro Baricco

Texas - James Michener
Chesapeake - James Michener
Cosmos - Carl Sagan
Creation - Gore Vidal
Atonement - Ian McEwan

Victory by Joseph Conrad
Archangel by Sharon Shinn
Jade by Sally Watson
Soaring by Jane Sherman
Macroscope by Piers Anthony

Snow by Orhan Pamuk
Snow by Nigel Frith
Fog by James Herbert
Crow by Ted Hughes
Enthusiasm by Ronald Knox

Wintersmith by Terry Pratchett
Mort by Terry Pratchett
Thud! by Terry Pratchett
Jingo by Terry Pratchett
Sourcery by Terry Pratchett

Republic by Plato
Purgatorio by Dante
Satyrica by Petronius
Illiad by Homer
Faust by Goethe

Schoolgirls by Peggy Orenstein
Seedfolks by Paul Fleischman
Snagged by Carol Higgins Clark
Squashed by Joan Bauer
Twilight by Stephenie Meyer

Affliction by Russell Banks
Choke by Chuck Palahniuk
Cusp by Robert A. Metzger
Eye by Frank Herbert
Remix by Jon Courtenay Grimwood

Blockade by Derek Hansen
Cathedral by Nelson de Mille
Entwined by Lynda La Plante
Grimoire by Kim Wilkins
Hooligans by William Diehl

Stardust, by Neil Gaiman
Neverwhere, by Neil Gaiman
Weight, by Jeanette Winterson
Lighthousekeeping, by Jeanette Winterson
Zombie, by Joyce Carol Oates

Wasteland, by Francesca Lia Block
Echo, by FLB
Primavera, by FLB
Ruby, by FLB
Nymph, by FLB

Seizure by Robin Cook
Liberty by Stephen Coonts
Violin by Anne Rice
Spin by Robert Charles Wilson
Timeline by Michael Crichton

Quicksilver -- Neal Stephenson
Worlds -- Joe Haldeman
Glasshouse -- Charles Stross
Humans -- That Canadian sci-fi author
Hybrids -- That same Canadian sci-fi author

Borzoi--Igor Schwezzof
Tersias--G.P.Taylor
Moonshine--Victoria Clayton
Ragwitch--Garth Nix
Steppenwolf--Hermann Hesse

Grimus--Salman Rushdie*
Songlines--Bruce Chatwin
Dragonsong--Anne McCaffrey
Greenmantle--Charles de Lint
Austerlitz--W.G.Sebald

* touchstone doesn't work

Zodiac
Jumper
Ammonite
Cryptonomicon
Lunatics

We by Yevgeny Zamyatin
Tristessa by Jack Kerouac
Howl by Allen Ginsberg
Gaudete by Ted Hughes
Compulsion by Meyer Levin

Grotesque
Incubus
Rose
Run

and I even have a book with a one LETTER title -
e

Takeoff, Rebecca! I thought you were my beloved, but alas, you are my nemesis, and frankly, I'm fed up with it.

Nemesis by Isaac Asimov
Gargantua by Antony Coburn
Foundation by Isaac Asimov - or does this count as a proper noun?
Triple by Ken Follett
1984 by George Orwell

misery by (stephen king)
emma by (jane austen)
lolita by (vladimir Nobokov)
america by (franz kafka)
peeps by (scott westerfeld)

Alchemy by Margaret Mahy
Bandbox by Thomas Mallon
Beauty by Sheri S. Tepper
Bellwether by Connie Willis
Bleachers by John Grisham

Brainrose by Nancy Kress
Contact by Carl Sagan
Coraline by Neil Gaiman
Corduroy by Dan Freeman
Dawn by Octavia Butler

Disobedience by Jane Hamilton
Dracula by Bram Stoker
Earthfall by Orson Scott Card
Enchantment by Orson Scott Card
Eragon by Christopher Paolini

Flashforward by Robert J. Sawyer
Fledgling by Octavia Butler
Flush by Carl Hiassan
Forever by Judy Blume
Grass by Sheri S. Tepper

Holes by Louis Sacher
Homebody by Orson Scott Card
Homecoming by Cynthia Voigt
Hominids by Robert J. Sawyer
Jewel by Bret Lott

Kartography by Kamila Shamsie
Kindred by Octavia Butler
Lilith by Jean Plaidy
March by Geraldine Brooks
Matilda by Roald Dahl

Midwives by Chris Bohjalian
Moo by Jane Smiley
Remake by Connie Willis
Replay by Ken Grimwood
Sideshow by Sheri S. Tepper

Taft by Ann Patchett
Tipperary by Frank Delaney
Voyager by Diana Gabaldon
Wish by Melina Gerosa Bellows
Xenocide by Orson Scott Card

Guilty! I missed the part about no proper noun. But I think I still have 28 valid titles...

(also had to fix some touchstones)

Querelle by Jean Genet
Pulp by Charles Bukowski
Nightwood by Djuna Barnes
Watchmen by Alan Moore
Imperium by Ryszard Kapuscinski

Regeneration, by Pat Barker (read 6 Feb 1997)
Watchers, by Dean Koontz (read 24 May 1997)
Moo, by Jane Smiley (read 26 May 1997)
Saville, by David Storey (read 15 Apr 1998) (Booker prize in 1976)
Birdsong, by Sebastian Faulks (read 21 Nov 1997)

I think some folks missed the bit about 'not a proper noun' (which means not the name of a person or place). So no points for 'Rebecca', 'Tigana', etc.

Snow by Orhan Pamuk
Credo by Melvyn Bragg
Complicity by Iain Banks
Thud! by Terry Pratchett
Transfigurations by Michael Bishop

I nearly missed the proper noun. I was going to list 5 books all called Titan.

inversions
Cowl
Eon
Who?
Flux

Dune
Affinity
Anthem
Belinda
Lolita

Oops, missed the part about a proper noun.

Blink
Bleachers
Brethren
Choke
Lullaby

Deception
Everyman
Messenger
Inferno
Lucky

Twilight
Twisted
Wanderlust

Freakonomics
Alexander
Iliad
Mona
Me

Queer William S. Burroughs
Faggots Larry Kramer
Fingersmith Sarah Waters
Sissy! Tom Mach
Straight Dick Francis

(1) Nightwood, by Djuna Barnes (read 15 Mar 1952)
(2) Disaster! by Ben Kortman and Leonard Brown (read 5 Apr 1967)
(3) Ficciones, by Jorge Luis Borges translated from the Spanish by Emece Editores (read 10 Jan 1970)
(4) Summer, by Edith Wharton (read 17 Apr 1976)

(5)Roots, by Alex Haley (read 28 Oct 1977) (Book of the Year)

(Hey, it's a lot harder with proper nouns not being permitted)

Declare - Tim Powers
Armor - John Steakley
Deprivers - Steven Elliot Altman
Everville - Clive Barker
Rascal - Sterling North

grrr....I missed the "no proper nouns." Which means kick Everville (name of the place) and Rascal (name of the raccoon) to the curb. Replace with:

Perfume - Patrick Suskind
Intuition - Allegra Goodman

Compulsion by Keith Ablow
Psychopath by Keith Ablow
Denial by Keith Ablow
Insomnia by Stephen King
Thrill! by Jackie Collins

Heartburn by Nora Ephron
Licorice by Abby Frucht
Misfortune by Wesley Stace
Poltergeist by Kat Richardson
Veils by Pat McGreal

Evolution by Steven Baxter
Bellwether by Connie Willis
Memory by Lois McMaster Bujold
Worldwar by Harry Turtledove
Timeline by Michael Crichton

Pure by Rebbecca Ray
Journals by Kurt Cobain
Loverboy by Victoria Redel
Midwives by Chris Bohjalian
Crave by Darnella Ford

Naked - Sedaris
Goat - Land
Beloved - Morrison
Texasville - McMurtry
Boomsday - Buckley
Shopgirl - Martin

Bite, edited by Laurel K. Hamilton
Swordspoint by Ellen Kushner
Legends, edited by Silverberg
Ceremony, by Parker
(Ceremony by Leslie Marmon Silko)
Babycakes by Armistead Maupin

"Mutiny" by Frank Tilsley
"Uprising" by Brent Monahan
Sayonara by James A. Michener
Oil! by Upton Sinclair
"City" by Clifford D. Simak

Watchers by Dean Koontz
Whispers by Peter Straub
Riptide by Douglas Preston/Lincoln Child
Rage by Jonathon Kellerman
Smokescreen by Dick Francis
She by Haggard

arrrr!! you have She too arr...

Them by Nathan McCall
She by H Rider Haggard
Us by Richard Mason
We by Yevgeny Zamyatin and Natasha Randall
I. by Stephen Dixon and Daniel Clowes

Ragtime
Airport
Trainspotting
Filth
Sphere
Cocoon
Sanctuary
Deliverance

Trumpet by Jackie Kay
Crash by J.G. Ballard
Kindred by Octavia E. Butler
Girls by Nic Kelman
Atonement by Ian McEwan

Hunger by Hamsun Knut
Saturday by Ian McEwan
Dry by Augusten Burroughs
Bodies by Jed Mercurio
Lamb by Bernard MacLaverty

Embers by Sandor Marai
Forever by Pete Hamill
Possession by A.S. Byatt
Waiting by Ha Jin
Holes by Louis Sachar

Shadows by John Saul
Caravan by Dorothy Gilman
Cluster by Piers Anthony
Tremor by Craig Dirgo
Monster by Jonathan Kellerman

Mayhem
Carousel
Kaleidoscope
Salamander
Mannequin

all by J. Robert Janes

Critical
Invasion
Shock
Toxin
Coma

all by Robin Cook

Persuasion by Jane Austen
Hood by Stephen R. Lawhead
Scarlet by Stephen R. Lawhead
Impressionism by Taschen
Magician by Raymond E. Feist

Contact by Carl Sagan
Watchers by Dean Koontz
Centennial by James Michener
Sarum by Edward Rutherfurd
Roots by Alex Haley

Velocity by Dean Koontz
Fledgling by Octavia Butler
Blaze by Stephen King
Cell by Stephen King
Lasher by Anne Rice

Wasp by Eric Frank Russell
Syrup by Maxx Barry
Circus by Alistair MacLean
Smoke by Donald Westlake
Hoops by Walter Dean Myers

Camouflage by Joe Haldeman
Inferno by Larry Niven
Light by John M. Harrison
Marrow by Robert Reed
Night by Elie Wiesel

Airborn, Kenneth Oppel
Hoot, Carl Hiaasen
Magyk, Angie Sage
Monster, Walter Dean Myers
Stowaway, Karen Hesse

Free by Marsha Hunt
Joy by Marsha Hunt
Caucasia by Danzy Senna
Paradise by Toni Morrison
Pride by Lorene Cary

Free by Marsha Hunt
Joy by Marsha Hunt
Caucasia by Danzy Senna
Paradise by Toni Morrison
Pride by Lorene Cary