(1) When Calls the Heart(2) When Comes the Spring(3) When Breaks the Dawn(4) When Hope Springs New(5) Beyond the Gathering Storm(6) When Tomorrow Comes
Oliver, Ben
The Loop (L)
(1) The Loop(2) The Block (3) The Arc
Oliver, Lauren
Delirium (D)
(1) Delirium(2) Pandemonium (3) Requiem
Oliver, Lauren
Replica (R)
(1) Replica(2) Ringer
Olsen, Gregg
Port Gamble Chronicles (PG)
(1) Envy AKA Beneath Her Skin (2) Betrayal AKA Dying to be Her
Oppel, Kenneth
Airborn (A)
(1) Airborn(2) Skybreaker(3) Starclimber
Oppel, Kenneth
Victor Frankenstein (VF)
(1) This Dark Endeavor(2) Such Wicked Intent
Oram, Kelly
Science Squad (S)
(1) The Avery Shaw Experiment(2) The Libby Garrett Intervention
Orlando, Kristen
Black Angel Chronicles (BA)
(1) You Don't Know My Name(2) You Won't Know I'm Gone(3) You Won't See Me Coming
O'Russell, Megan
Bryant Adams (A)
(1) How I Magically Messed Up My Life in Four Freakin' Days(2) Seven Things Not to Do When Everyone's Trying to Kill You(3) Three Simple Steps to Wizarding Domination(4) Five Spellbinding Laws of Interdisciplinary Larceny
O'Russell, Megan
Heart of Smoke (HS)
(1) Heart of Smoke(2) Soul of Glass(3) Eye of Stone(4) Ash of Ages
Owen, Jule
House Next Door (H)
(1) The Boy Who Fell From the Sky (2) Silverwood(3) The Moon at Noon