- O Alerta dos Corvos
- O Andarilho e o Lobo (Victor)
- O Anjo Zacarias
- O Clube de Mistérios de Deise - Um coração que pulsa além do Cemitério na Montanha Sombria
- O Coração Do Tempo
- O Cérebro do Anticristo
- O código de feitiçaria (O código de feitiçaria: Volume 1)
- O Dragão de Ônix - Lendas dos Dragões Metamorfósicos Livro 2
- O Encanto do Ouro
- O FIltro dos Sonhos
- O golpe
- O Homem da Cartola
- O jardim proibido, tomo 1 (Bekhor)
- O limite de tudo
- O Livro Completo dos Anjos Caídos
- O Martelo das Feiticeiras
- O Mundo Fantástico de Pedro
- O Paradoxo da Angústia
- O partido
- O Pêndulo do Tempo
- O Reino do Feitiço (O Código de Feitiçaria: Volume 2)
- O Relojoeiro: um conto
- O tempo do amor
- O Toque da Neve
- O vampiro Armand
- O ônibus Tatterdemon
- O Último Em Pé
- O'Ceagan's Legacy
- O'Hare House Mysteries
- Oak
- Oak & Thorns
- Oak and Mirrors
- Oath Bound
- Oath of Blood
- Oathbreaker: part of Warlocks
- Oaths of Blood
- Obcecada (Livro #12 da série Memórias de Um Vampiro)
- Object of My Affection
- Obliterate
- Obliteration
- Oblivion
- Oblivion Storm
- Oblivious Demon
- Obloquy
- Obras Maestras de H.P. Lovecraft
- Obscure Vision
- Obscured
- Obscured Lover (Blackness Falls #2) (A Paranormal Romance Book)
- Observados
- Obsesionada (Libro # 12 Del Diario Del Vampiro)
- Obsessed (Book #12 in the Vampire Journals)
- Obsessed Exposed Saving Serenity Part I
- Obsession
- Obsession (Tome n 12 de Mémoires d'un Vampire)
- Obsidian (Mystic Stones Series #1)
- Obsidian Butterfly
- Obsidian Dungeon
- Obsidian Flames (A Short Tale)
- Obsidian's Edge: An Elemental Legacy Anthology
- Obsidian's Eye
- Occhi di Gufo
- Occhi verdi
- Occultic;Nine Volume 3
- Ocean Light
- Ocean of Empathy
- Ocean Song Trilogy
- Ocean's Justice
- Ocean's Kiss
- Oceano di pietra
- Oceans & Potions
- Oceans of Fire
- Oceans Of Fire
- Ochre Dragon
- October Nights 3
- October Snow
- Od and Ed
- Odd Thomas: You Are Destined to Be Together Forever (Short Story)
- Odnaleziona (Część 8 Wampirzych Dzienników)
- Odyssey of Daniel Bonner
- Odyssées chimériques
- Of A Dark Heart
- Of Blood and Angels
- Of Blood and Bone
- Of Blood and Desire
- Of Blood and Politics
- Of Claws and Fangs
- Of Blood and Politics
- Of Claws and Fangs
- Of Covens and Packs
- Of Dragons, Damsels, and Dildos
- Of Fate and Phantoms
- Of Focused Intent
- Of Gods & Tigers
- Of Heaven and Hell
- Of Love and Evil
- Of Love and Vampires
- Of Mice and MacKays
- Of Moons and Monsters
- Of Shadow Born
- Of Shapeshifters and Storms
- Of Songs and Horns: A Radio Arcanum Novella
- Of Sparta
- Of Stone & Mist
- Of The Grave
- Of the Spirit
- Of Things Not Seen
- Of Warriors and Wisdom
- Of Water and Sky
- Of Wings and Wolves (The Cain Chronicles, #6)
- Of Witch's Blood
- Of Wolf and Male
- Of Wolves and Witches and Fireballs in the Sky
- Off Course
- Off with the Fairies
- Off-Air
- Offerings
- Offerings for Arianrhod
- Office
- Office Politics
- Ogan the Chosen One
- Ogród Utrapień Transcendentnych
- Oh, Holy Knight
- Ohne Gesicht
- Old Blood Book Three
- Old Blood Book Two
- Old Mr. Wiley
- Old Sins, Long Shadows
- Old Soldiers