- O'Bryan, Tom
You Can Fix Your Brain
- O'Bryant, Karyn
The Map of Lost Memories, Who Was Joan of Arc?
- O'Connell, Mark
Notes from an Apocalypse, To Be a Machine
- O'Connor, John
His Dark Materials: The Golden Compass (Book 1), His Dark Materials: The Golden Compass (Book 1)
- O'Connor, Nancy
The Enchanted Files: Trolled
- O'Connor, Sandra Day
The Majesty of the Law, Out of Order
- O'Donnell, Ellen
Bless This Mess
- O'Donnell, Lawrence
Playing with Fire, Playing with Fire
- O'Dowd, Chris
Fantastic Mr. Fox and Other Animal Stories, Fantastic Mr. Fox and Other Animal Stories
- O'Halloran, Tim
Based on a True Story
- O'Hara-Baker, Jessica
The Mister, The Mister
- O'Hare, Denis
Willpower, The Alchemyst
- O'Hurley, John
It's Okay to Miss the Bed on the First Jump
- O'Keefe, Michael
The Way of Leadership
- O'Leary, John
In Awe
- O'Malley, Rory
How to Survive a Plague
- O'Malley, Susan
American Sphinx
- O'Mara, Jason
The Break Line, All Fall Down
- O'Neal, Ryan
Both of Us
- O'Neil, Cathy
Weapons of Math Destruction
- O'Neill, Eric
Gray Day
- O'Neill, Heather
The Minister's Daughter, The Likeness
- O'Reilly, Bill
The No Spin Zone, Who's Looking Out For You?
- O'Rourke, Meghan
The Long Goodbye
- Oakes, Summer Rayne
How to Make a Plant Love You
- Oakley, Barbara
Uncommon Sense Teaching, Mindshift
- Oakley, Bill
Serious Eater
- Obama, Barack
Dreams from My Father, Of Thee I Sing
- Obama, Michelle
Becoming, Becoming
- Oberon, Elea
LeBootcamp Diet
- Obi, Damaras
Turning 15 on the Road to Freedom
- Obi-Melekwe, Nkeki
Ties That Tether, Rebel Sisters
- Ochlan, P.J.
The Enchanted Files: Trolled, The Other Americans
- Ochlan, PJ
little scratch
- Ochman, Joe
Don't Know Much About Geography, She Has Her Mother's Laugh
- Odom, Leslie
Like No Other
- Oduye, Adepero
War Girls, The Beautiful Ones
- Offerman, Nick
The Greatest Love Story Ever Told, Lincoln in the Bardo
- Oh, Ellen
Flying Lessons & Other Stories, Flying Lessons & Other Stories
- Oh, Jina
A Step From Heaven
- Oh, Sandra
Human Acts
- Ojo, Adenrele
When God Made You, It Wasn't Me
- Olbermann, Keith
Trump is F*cking Crazy
- Older, Daniel José
Last Shot (Star Wars), From a Certain Point of View (Star Wars)
- Older, Daniel Jose
Brave the Page
- Oldjohn, Khalipa
The First Part Last
- Oliver, Mary
Dog Songs
- Olivo, Karen
The Brief Wondrous Life of Oscar Wao
- Olsher, Dean
The Stuff of Thought
- Onayemi, Prentice
Exponential Living, The Meaning of Michelle
- Ondaatje, Michael
Warlight, Divisadero
- Onwuachi, Kwame
Notes from a Young Black Chef (Adapted for Young Adults), Notes from a Young Black Chef
- Onwukwe, Ben
Gnomon, The Gap of Time
- Ordunio, Doug
Crashing Through, Guns, Germs, and Steel
- Oren, Michael B.
Ally
- Oreskes, Dan
L.A. Rex
- Oreskes, Daniel
Suite Francaise, Haunting Paris
- Orji, Yvonne
Good Night Stories for Rebel Girls: 100 Immigrant Women Who Changed the World, Good Night Stories for Rebel Girls: 100 Immigrant Women Who Changed the World
- Orloff, Judith
Positive Energy, Emotional Freedom
- Orloff, Judith
The Power of Surrender, The Ecstasy of Surrender
- Orlow, Rich
The Ruins, The Wisdom of Compassion
- Orman, Roscoe
They Had a Dream
- Orman, Suze
Women & Money (Revised and Updated), The Money Class
- Orner, Peter
Maggie Brown & Others
- Ornish, Anne
Undo It!
- Ornish, Dean
Enjoy Every Sandwich, Undo It!
- Ortega, Roxana
Lola, American Heroin
- Orth, Maureen
Vulgar Favors
- Ortiz, Jaina Lee
The Beloved World of Sonia Sotomayor
- Ortiz, Laura
The Three Billy Goats Buenos, La Princesa and the Pea
- Osborne, Mary Pope
Balto of the Blue Dawn, Camp Time in California
- Osborne, Steve
The Job
- Osbourne, Kelly
There Is No F*cking Secret
- Osgood, Nathan
The Road to Little Dribbling, The Road to Little Dribbling
- Osho,
A Course in Meditation, Coming Home to Yourself
- Osorio, Ana
The Grief Keeper
- Ospina, Alejandra
Disability Visibility: First-Person Stories from the Twenty-First Century
- Oster, Emily
Cribsheet, Expecting Better
- Oswalt, Patton
Courage Is Contagious, The United States of Absurdity
- Ovens, Sarah
The Adults
- Ovitz, Michael
Who Is Michael Ovitz?
- Owens, Bobbi
Up Close: Oprah Winfrey
- Owusu, Jude
This Book Will Make You Kinder
- Oyeyemi, Helen
Gingerbread, Peaces
- Oz, Mehmet
Quit Vaping
- Ozawa, Louis
Fifty Words for Rain
