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      Book Series by Author: O

      Browse FictionDB book series written by authors whose last names begin with O, including book counts, genres, and age-level information for quick browsing.

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      Letter: O Showing: 101–150 Total series: 172
      The Nameless Republic 2 books
      by Okungbowa, Suyi Davies
      Primary Genre Fantasy
      Twith Logue Chronicles: Adventures with the Little People 6 books
      by Old, Kenneth G.; West, Patty Old
      Primary Genre Fantasy
      Age Level Middle Grade (Ages 8-12)
      A Bone Street Rumba Novel 3 books
      by Older, Daniel Jose
      Primary Genre Urban Fantasy
      Dactyl Hill Squad 3 books
      by Older, Daniel Jose
      Primary Genre Fantasy
      Age Level Kids (12 & Under)
      Outlaw Saints 2 books
      by Older, Daniel Jose
      Primary Genre Action Adventure, Fantasy
      The Shadowshaper Cypher 5 books
      by Older, Daniel Jose
      Primary Genre Fantasy
      Centenal Cycle 3 books
      by Older, Malka
      Primary Genre Thriller
      My Magical Pony 14 books
      by Oldfield, Jenny
      Primary Genre Speculative Fiction
      Age Level Middle Grade (Ages 8-12)
      A Wicked Games Novel 2 books
      by Olin, Sean
      Primary Genre Horror
      Age Level Young Adult (12-17)
      Into the White 3 books
      by Olivant, T.E.
      Primary Genre Science Fiction
      Demon Trapper 5 books
      by Oliver, Jana
      Primary Genre Urban Fantasy
      Age Level Young Adult (12-17)
      Time Rovers 3 books
      by Oliver, Jana
      Primary Genre Science Fiction Romance, Fantasy
      Delirium 8 books
      by Oliver, Lauren
      Primary Genre Romance, Speculative Fiction
      Age Level Young Adult (12-17)
      Fantastic Frame 5 books
      by Oliver, Lin
      Primary Genre Speculative Fiction
      Age Level Chapter Books (Ages 7-10)
      Sound Bender 2 books
      by Oliver, Lin; Baker, Theo
      Primary Genre Fantasy
      Age Level Middle Grade (Ages 8-12)
      Forged Bloodlines 9 books
      by Olsen, Lisa
      Primary Genre Paranormal Romance
      Boundary Magic 5 books
      by Olson, Melissa F.
      Primary Genre Speculative Fiction
      Disrupted Magic 4 books
      by Olson, Melissa F.
      Primary Genre Fantasy
      Nightshades 3 books
      by Olson, Melissa F.
      Primary Genre Fantasy
      A Scarlett Bernard Novel 3 books
      by Olson, Melissa F.
      Primary Genre Urban Fantasy
      Malediction Saga 3 books
      by Olson, Yolanda
      Primary Genre Gothic, Horror
      Cole Ryan 2 books
      by Omololu, C.J.
      Primary Genre Fantasy
      Age Level Young Adult (12-17)
      Is It Wrong to Try to Pick Up Girls in a Dungeon? (light novel) 17 books
      by Omori, Fujino
      Primary Genre Action Adventure, Fantasy
      Is It Wrong to Try to Pick Up Girls in a Dungeon? (manga) 11 books
      by Omori, Fujino
      Primary Genre Manga, Fantasy
      Age Level Young Adult (12-17)
      Is It Wrong to Try to Pick Up Girls in a Dungeon? Familia Chronicle (light novel) 2 books
      by Omori, Fujino
      Primary Genre Action Adventure, Fantasy
      Is It Wrong to Try to Pick Up Girls in a Dungeon? Familia Chronicle Episode Lyu (manga) 6 books
      by Omori, Fujino
      Primary Genre Heroic Fantasy / Sword & Sorcery, Manga
      Age Level Young Adult (12-17)
      Is It Wrong to Try to Pick Up Girls in a Dungeon? Four-Panel (manga) 2 books
      by Omori, Fujino
      Primary Genre Manga, Fantasy
      Age Level Young Adult (12-17)
      Is It Wrong to Try to Pick Up Girls in a Dungeon? On the Side: Sword Oratoria (light novel) 12 books
      by Omori, Fujino
      Primary Genre Fantasy
      Is It Wrong to Try to Pick Up Girls in a Dungeon? On the Side: Sword Oratoria (manga) 19 books
      by Omori, Fujino
      Primary Genre Manga, Fantasy
      Age Level Young Adult (12-17)
      Is It Wrong to Try to Pick Up Girls in a Dungeon? Season 2 (manga) 3 books
      by Omori, Fujino
      Primary Genre Manga, Fantasy
      War Girls 2 books
      by Onyebuchi, Tochi
      Primary Genre Dystopian, Science Fiction
      Age Level Young Adult (12-17)
      The Apprenticeship of Victor Frankenstein 2 books
      by Oppel, Kenneth
      Primary Genre Speculative Fiction
      Age Level Young Adult (12-17)
      Matt Cruse 2 books
      by Oppel, Kenneth
      Primary Genre Alternative History, Steampunk, Fantasy
      Age Level Young Adult (12-17)
      Jamie Baker 3 books
      by Oram, Kelly
      Primary Genre Romance
      Age Level Young Adult (12-17)
      Supernaturals 3 books
      by Oram, Kelly
      Primary Genre Speculative Fiction
      Carrowkeel 3 books
      by Oram, Nina
      Primary Genre Fantasy
      Age Level Young Adult (12-17)
      The Alien Trilogy 3 books
      by Ore, Rebecca
      Primary Genre Speculative Fiction
      Billy Blaster 12 books
      by Orme, David
      Primary Genre Speculative Fiction
      Age Level Middle Grade (Ages 8-12)
      Water and the Wild 2 books
      by Ormsbee, K.E.
      Primary Genre Fantasy
      Age Level Middle Grade (Ages 8-12)
      Black Nether 3 books
      by Orona, Michael
      Primary Genre Science Fiction
      Between Two Evils 3 books
      by Orton, D.L.
      Primary Genre Science Fiction Romance
      Madders of Time 3 books
      by Orton, D.L.
      Primary Genre Mystery, Science Fiction
      Vault of Heaven 2 books
      by Orullian, Peter
      Primary Genre Epic Fantasy
      Mirror World 4 books
      by Osadchuk, Alexey
      Primary Genre Science Fiction, Fantasy
      Underdog 6 books
      by Osadchuk, Alexey
      Primary Genre Science Fiction, Fantasy
      Age Level Young Adult (12-17)
      Iroshi 3 books
      by Osborne, Cary
      Primary Genre Science Fiction
      The Memory War 2 books
      by Osborne, Karen
      Primary Genre Action Adventure, Space Opera
      Magic Tree House 63 books
      by Osborne, Mary Pope
      Primary Genre Action Adventure, Fantasy
      Age Level Chapter Books (Ages 7-10)
      Magic Tree House Merlin Missions 39 books
      by Osborne, Mary Pope
      Primary Genre Action Adventure, Fantasy
      Age Level Chapter Books (Ages 7-10)
      Battlegrounds Online 3 books
      by Osgood, Troy
      Primary Genre Speculative Fiction