- Obsession (Regency Lovers 2)
- Obsessions Intimes (Les Chroniques Krinar: Volume 2)
- Obsessão Íntima
- Obsidian
- Obsidian (Mystic Stones Series #1)
- Obsidian 0: Oblivion 1. Lichtflüstern
- Obsidian 0: Oblivion 2. Lichtflimmern
- Obsidian 0: Oblivion 3. Lichtflackern
- Obsidian 2: Onyx. Schattenschimmer
- Obsidian 3: Opal. Schattenglanz
- Obsidian 4: Origin. Schattenfunke
- Obsidian 5: Opposition. Schattenblitz
- Obsidian Butterfly
- Obsidian Flame
- Obsidian Hunger
- Obsidian Moons
- Obsidian Prey
- Obsidian Sun
- Obsidian Veil Book One: tick-tock-tick-tock... time stops for no man
- Obsidian: Band 1-5 der paranormalen Fantasy-Serie im Sammelband!
- Obsidian: Oblivion – Band 1-3 der romantischen Fantasy-Serie im Sammelband
- Obsidian: Shadows. Finsterlicht (Obsidian-Prequel)
- Obsidiana
- Obsolete
- Occult & Supernatural Tales
- Ocean Light
- Ocean Love
- Ocean of Empathy
- Ocean Spirit: The Story of an Undine
- Ocean's Three [Made In Heaven 2]
- Oceana the Futa Mermaid
- Oceanblue - Lügen der Rettung
- Oceans Beneath Dragons: Maiden to the Dragon #5 (Alpha Dragon Shifter Romance)
- Oceans of Fire
- Oceans Of Fire
- Oceans Untamed
- Ocelot of Trouble
- Ochate. Realidad y leyenda del pueblo maldito
- Ochi In Intuneric
- Ochi În Întuneric
- Octavia's Choice
- Octavia's Time [The Klawinken 1]
- Octavia's War
- Ocultando la Verdad
- Odd John: A Story Between Jest and Earnest
- Odd Mate
- Odd Melody
- Odd Thomas: You Are Destined to Be Together Forever (Short Story)
- Odd Wolf
- Odds and Ends Stories and Essays From the Sixties
- Odelia's Pirate
- Odessa's Stories
- Odile - Legend of the Black Swan
- Odin Stone
- Odissea nella nebbia
- Odjuren Hela bokserien
- Oeuvres poétiques (Complete)
- Of A Strange and Dark Vintage
- Of Another World
- Of Bards and Witches
- Of Blood & Moon
- Of Blood and Angels
- Of Blood and Bone
- Of Blood and Desire
- Of Blood and Monsters
- Of blood… Without love - Tome 2
- Of Bread and Boyfriends
- Of Consuming Fire
- Of Curses and Charms
- Of Daggers and Dreamers
- Of Dreams and Angels
- Of Dreams and Dragons
- Of Fate and Phantoms
- Of Fey and Gabble Ratchets
- Of Fire And Flame
- Of Flame and Fate
- Of Flame and Fury
- Of Flame and Light
- Of Flame and Promise
- Of Ghosts and Dreams
- Of Ghosts and Geeks
- Of Gifts and the Goddess
- Of Gods And Monsters
- Of Gods and Mortals
- Of Heaven and Hell
- Of Humans and Mates
- Of Heaven and Hell
- Of Humans and Mates
- Of Iron and Gold
- Of Kindred and Stardust
- Of Kisses & Quests
- Of Last Resort
- Of Love and Intrigue
- Of Love and Zembores
- Of Magic and Mating
- Of Mates and Barters
- Of Mating and Monsters
- Of Mettle and Magic
- Of Mischief and Magic
- Of Monsters and Love
- Of Night and Desire
- Of Objects and Obsessions
- Of Prophecies and Promises
- Of Rain Barrels and Bridges
- Of Sand and Stone
- Of Shadows and Ash
- Of Shapeshifters and Storms
- Of Starlit Balls and Starship Captains
- Of Stars and Secrets
- Of the Blood: The Complete Series
- Of the Cursed
- Of the Dragonfly
- Of The Grave
- Of The Heart
- Of the New World
- Of The Night
- Of the Panther Persuasion
- Of the Spirit
- Of Thorns and Pearls
- Of Venice, of Love, of Magic
- Of Warriors and Wisdom
- Of Water and Fire
- Of Wings and Wolves (The Cain Chronicles, #6)
- Of Wolf and Male
- Of Wolves and Men
- Off Book
- Off Course
- Off Kilter