- O'Brien, Daniel
How to Fight Presidents, Your Presidential Fantasy Dream Team
- O'Brien, Keith
Paradise Falls, Paradise Falls
- 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
Good Job, George!, Nina, Nina Ballerina
- O'Connor, Jim
Who Is Bob Dylan?, What Was Pompeii?
- 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
- O'Donnell, Svenja
Inge's War
- O'Farrell, Maggie
The Marriage Portrait, Instructions for a Heatwave
- O'Gieblyn, Meghan
God, Human, Animal, Machine, Interior States
- O'Hara, John
Ten North Frederick, 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, The No-Show
- 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'Neal Johnston, Amber
A Place to Belong
- O'Neil, Carolyn Tara
Daughters of a Dead Empire
- O'Neil, Cathy
Weapons of Math Destruction, The Shame Machine
- O'Neil, Dana
The Big East
- O'Neill, Eric
Gray Day
- O'Neill, Gerard
Whitey
- O'Neill, Heather
When We Lost Our Heads, The Lonely Hearts Hotel
- O'Neill, Joseph
Good Trouble, The Dog
- O'Reilly, Bill
The Silence of War, The No Spin Zone
- O'Reilly, Finbarr
Shooting Ghosts
- O'Rourke, Meghan
The Long Goodbye, The Invisible Kingdom
- 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
Mindshift, Uncommon Sense Teaching
- Oakley, Colleen
You Were There Too, The Invisible Husband of Frick Island
- Oates, Joyce Carol
Foxfire, Babysitter
- Obama, Barack
The Audacity of Hope, Dreams from My Father
- Obama, Michelle
American Grown, Becoming
- Obama for Change,
Change We Can Believe In
- Obaro, Tomi
Dele Weds Destiny, Dele Weds Destiny
- Obmascik, Mark
The Big Year
- Obreht , Téa
Inland, The Tiger's Wife
- Ockler, Sarah
The Book of Broken Hearts, Bittersweet
- Ockwell-Smith, Sarah
Ready, Set, Go!
- Odell, Jonathan
The Healing
- Odenkirk, Bob
Comedy Comedy Comedy Drama
- Odhiambo, Eucabeth
She Persisted: Wangari Maathai
- Oelwang, Jean
Partnering
- Offerman, Nick
The Greatest Love Story Ever Told, Where the Deer and the Antelope Play
- Offill, Jenny
Weather, Dept. of Speculation
- Ofgang, Erik
The Good Vices
- Ofgang, Harry
The Good Vices
- Ogas, Ogi
Journey of the Mind
- Ogawa, Yoko
The Memory Police
- Ohlin, Alix
We Want What We Want, Dual Citizens
- Ohman, Jules
Body Grammar
- 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
From a Certain Point of View (Star Wars), Last Shot (Star Wars)
- Olds, Sharon
Balladz, Stag's Leap
- Oliva, Alexandra
The Last One, Forget Me Not
- Oliveira, Robin
My Name Is Mary Sutter, Winter Sisters
- Oliver, Katie
A Murderous Persuasion, Pride, Prejudice, and Peril
- Oliver, Lauren
The Spindlers, Pandemonium
- Oliver, Lin
Hank Zipzer #2: I Got a "D" in Salami, Hank Zipzer #4: The Zippity Zinger
- Oliver, Mary
Dog Songs and A Thousand Mornings
- Oller, John
Rogues' Gallery, White Shoe
- Olmstead, Grace
Uprooted
- Olnek, Madeleine
A Practical Handbook for the Actor
- Olorunnipa, Toluse
His Name Is George Floyd, His Name Is George Floyd
- Olsen, Elizabeth
Hattie Harmony: Worry Detective
- Olsen, Rena
The Girl Before, With You Always
- Olson, Lynne
Last Hope Island, Madame Fourcade's Secret War
- Olsson, Linda
A Sister in My House
- Oluseyi, Hakeem
A Quantum Life
- Omotoso, Yewande
The Woman Next Door
- Ondaatje, Michael
Divisadero, Warlight
- Onome, Louisa
Like Home
- Onwuachi, Kwame
Notes from a Young Black Chef, Notes from a Young Black Chef (Adapted for Young Adults)
- 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
Hatch, Inkling
- Oppenheimer, Andres
The Robots Are Coming!
- Oppenheimer, Mark
Squirrel Hill
- Orange, Michelle
Pure Flame
- Orange, Tommy
There There, There There
- Oren, Michael B.
Ally
- Orfalea, Paul
Copy This!
- Orlean, Susan
My Kind of Place
- Orloff, Judith
Second Sight, Positive Energy
- Orloff, Judith
The Power of Surrender, The Ecstasy of Surrender
- Orlov, Melissa
Married to Distraction
- Orman, Suze
Women & Money (Revised and Updated), The Money Class
- 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
- Orsoni, Valerie
LeBootcamp Diet
- Orth, Maureen
Vulgar Favors
- Osborne, Lawrence
The Glass Kingdom, On Java Road
- Osborne, Mary Pope
Stage Fright on a Summer Night, Magic Tree House Collection: Books 29-32
- 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 Man Who Died Twice, The Man Who Died Twice
- Osmundson, Joseph
Virology
- Ostby, Anne
Pieces of Happiness
- Oster, Emily
The Family Firm, Expecting Better
- Ostow, Micol
Westminster Abby
- Osunde, Eloghosa
Vagabonds!
- Otheguy, Emma
The Madre de Aguas of Cuba, Sofía Acosta Makes a Scene
- Otis, Chad
The Bright Side
- Otsuka, Julie
When the Emperor Was Divine, The Swimmers
- Ovitz, Michael
Who Is Michael Ovitz?
- Owen, Andrea
Make Some Noise
- Owen, David
Volume Control, Where the Water Goes
- Owen, Lauren
The Quick, Small Angels
- Owen, Mark
No Hero
- Owens, Delia
Where the Crawdads Sing, Where the Crawdads Sing
- Owens, Lisa
Not Working
- Owens, Michele L.
Silent Agreements
- Owens, Zibby
Princess Charming
- Oxenham, Gwendolyn
Pride of a Nation
- Oyeyemi, Helen
Peaces, Gingerbread
- Oyler, Lauren
Fake Accounts
- Ozeki, Ruth
The Book of Form and Emptiness
- Ozick, Cynthia
The Puttermesser Papers, Antiquities and Other Stories
