- O'Brien, Daniel
How to Fight Presidents, Your Presidential Fantasy Dream Team
- O'Brien, Perry
Fire in the Blood
- O'Brien, Phillips Payson
The Second Most Powerful Man in the World
- O'Brien, Timothy L.
The Lincoln Conspiracy
- O'Bryan, Tom
You Can Fix Your Brain
- O'Connell, Mark
To Be a Machine, Notes from an Apocalypse
- O'Connell, Robert L.
Revolutionary
- O'Connell, Vanessa
Wheelmen
- O'Connor, Flannery
Good Things Out of Nazareth
- O'Connor, Jane
Nina, Nina Ballerina, Nina, Nina Star Ballerina
- O'Connor, Jim
Who Is Bob Dylan?
- O'Connor, Nuala
Becoming Belle
- O'Connor, Sandra Day
The Majesty of the Law, Out of Order
- O'Dell, Kathleen
Ophie Out of Oz
- O'Dell, Scott
Island of the Blue Dolphins, Island of the Blue Dolphins
- O'Dell, Tawni
Sister Mine
- O'Donnell, Ellen
Bless This Mess
- O'Donnell, Lawrence
Playing with Fire, Playing with Fire
- O'Donnell, Svenja
Inge's War
- O'Farrell, Maggie
Instructions for a Heatwave, I Am, I Am, I Am
- O'Gieblyn, Meghan
Interior States, God, Human, Animal, Machine
- O'Hara, John
BUtterfield 8, Appointment in Samarra
- O'Hurley, John
It's Okay to Miss the Bed on the First Jump
- O'Keefe, Molly
Can't Buy Me Love, Can't Hurry Love
- O'Keefe Aptowicz, Cristin
Dr. Mutter's Marvels
- O'Leary, Beth
The Road Trip
- O'Leary, John
In Awe
- O'Mara, Margaret
The Code
- O'Nan, Stewart
Songs for the Missing, Henry, Himself
- O'Neal, Barbara
The Lost Recipe for Happiness
- O'Neal, Eilis
The False Princess
- O'Neal, Ryan
Both of Us
- O'Neil, Cathy
Weapons of Math Destruction
- O'Neill, Eric
Gray Day
- O'Neill, Gerard
Whitey
- O'Neill, Heather
The Lonely Hearts Hotel
- O'Neill, Joseph
Good Trouble, The Dog
- O'Reilly, Bill
Culture Warrior, Keep It Pithy
- O'Reilly, Finbarr
Shooting Ghosts
- O'Rourke, Meghan
The Long Goodbye
- O'Shaughnessy, Kate
The Lonely Heart of Maybelle Lane
- O'Sullivan, Suzanne
The Sleeping Beauties
- O'Toole, Mike
The Unconventionals
- Oakes, Summer Rayne
How to Make a Plant Love You
- Oakley, Barbara
Uncommon Sense Teaching, Mindshift
- Oakley, Colleen
You Were There Too, The Invisible Husband of Frick Island
- Oates, Joyce Carol
Foxfire
- Obama, Barack
Dreams from My Father, Dreams from My Father
- Obama, Michelle
Becoming, American Grown
- Obama for Change,
Change We Can Believe In
- Obmascik, Mark
The Big Year
- Obreht , Téa
Inland, Inland
- Ockler, Sarah
The Book of Broken Hearts, Bittersweet
- Ockwell-Smith, Sarah
Ready, Set, Go!
- Odell, Jonathan
The Healing
- Offerman, Nick
The Greatest Love Story Ever Told, Gumption
- Offill, Jenny
Weather
- Ofgang, Erik
The Good Vices
- Ofgang, Harry
The Good Vices
- Ogawa, Yoko
The Memory Police
- Ohlin, Alix
We Want What We Want, Dual Citizens
- Okorafor, Nnedi
From a Certain Point of View (Star Wars)
- Oksanen, Sofi
Norma, Dog Park
- Olbermann, Keith
Trump is F*cking Crazy
- Older, Daniel José
Last Shot (Star Wars), From a Certain Point of View (Star Wars)
- Oliva, Alexandra
The Last One, Forget Me Not
- Oliveira, Robin
My Name Is Mary Sutter, Winter Sisters
- Oliver, Lauren
Requiem, The Spindlers
- Oliver, Lin
Hank Zipzer #2: I Got a "D" in Salami, Hank Zipzer #3: Day of the Iguana
- Oliver, Mary
Dog Songs
- Oller, John
White Shoe
- Olmstead, Grace
Uprooted
- Olsen, Rena
With You Always, The Girl Before
- Olson, Lynne
Madame Fourcade's Secret War, Last Hope Island
- Olsson, Linda
A Sister in My House
- Oluseyi, Hakeem
A Quantum Life
- Omotoso, Yewande
The Woman Next Door
- Ondaatje, Michael
The Cat's Table, The English Patient
- Onwuachi, Kwame
Notes from a Young Black Chef (Adapted for Young Adults), Notes from a Young Black Chef
- Onyebuchi, Tochi
Beasts Made of Night, War Girls
- Opdyke, Irene Gut
In My Hands: Memories of a Holocaust Rescuer
- Oppegaard, David
The Suicide Collectors
- Oppel, Kenneth
Thrive, Inkling
- Oppenheimer, Andres
The Robots Are Coming!
- Oppenheimer, Mark
Squirrel Hill
- Orange, Tommy
There There, There There
- Oren, Michael B.
Ally
- Orfalea, Paul
Copy This!
- Orlean, Susan
My Kind of Place
- Orloff, Judith
Second Sight, Emotional Freedom
- Orloff, Judith
The Power of Surrender, The Ecstasy of Surrender
- Orlov, Melissa
Married to Distraction
- Orman, Suze
Suze Orman's 2009 Action Plan, Women & Money (Revised and Updated)
- Orner, Peter
Maggie Brown & Others
- Ornish, Anne
Undo It!
- Ornish, Dean
Undo It!, Enjoy Every Sandwich
- Orr, Elaine Neil
Swimming Between Worlds
- Orringer, Julie
The Invisible Bridge, The Flight Portfolio
- Orsoni, Valerie
LeBootcamp Diet
- Orth, Maureen
Vulgar Favors
- Osborne, Lawrence
The Forgiven, Only to Sleep
- Osborne, Mary Pope
Soccer on Sunday, A Crazy Day with Cobras
- Osborne, Steve
The Job
- Osbourne, Kelly
There Is No F*cking Secret
- Oshinsky, David
Bellevue
- Osho,
Coming Home to Yourself, A Course in Meditation
- Osman, Richard
The Thursday Murder Club, The Thursday Murder Club
- Ostby, Anne
Pieces of Happiness
- Oster, Emily
Cribsheet, Expecting Better
- Ostow, Micol
Westminster Abby
- Otheguy, Emma
The Madre de Aguas of Cuba
- Otsuka, Julie
The Buddha in the Attic, When the Emperor Was Divine
- Ovitz, Michael
Who Is Michael Ovitz?
- Owen, Andrea
Make Some Noise
- Owen, David
Volume Control, Where the Water Goes
- Owen, Lauren
The Quick
- Owen, Mark
No Hero
- Owens, Delia
Where the Crawdads Sing, Where the Crawdads Sing
- Owens, Lisa
Not Working
- Owens, Michele L.
Silent Agreements
- Oyeyemi, Helen
Peaces, Gingerbread
- Oyler, Lauren
Fake Accounts
- Ozick, Cynthia
Antiquities
