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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: 1–50 Total series: 171
      Birthmarked 3 books
      by O'Brien, Caragh M.
      Primary Genre Science Fiction
      Age Level Young Adult (12-17)
      Vault of Dreamers 3 books
      by O'Brien, Caragh M.
      Primary Genre Speculative Fiction
      Age Level Young Adult (12-17)
      A Skull Serial Killer Thriller 4 books
      by O'Brien, Emerald
      Primary Genre Crime, Psychological Suspense, Thriller
      The Duaredheim Staff Saga 4 books
      by O'Brien, Erik D.J.
      Primary Genre Speculative Fiction
      Alfie Green 9 books
      by O'Brien, Joe
      Primary Genre Fantasy
      Age Level Middle Grade (Ages 8-12)
      An American Faerie Tale 3 books
      by O'Connell, Bishop
      Primary Genre Urban Fantasy
      Ghost Academy 4 books
      by O'Connor, K.E.
      Primary Genre Dark Fantasy
      Heir Hunters 5 books
      by O'Connor, K.E.
      Primary Genre Dark Fantasy, Urban Fantasy
      An Old Sarum Witch Cozy Mystery 3 books
      by O'Connor, K.E.
      Primary Genre Dark Fantasy
      The School of Exorcists 6 books
      by O'Connor, K.E.
      Primary Genre Romance
      The Angelorum Twelve Chronicles 3 books
      by O'Connor, L.G.
      Primary Genre Romance
      The Multiverses 4 books
      by O'Connor, Liza
      Primary Genre Science Fiction
      The SkyRyders 3 books
      by O'Connor, Liza
      Primary Genre Science Fiction Romance
      Conguise Chronicles 5 books
      by O'Dea, L.S.
      Primary Genre Dark Fantasy
      Lake of Sins 5 books
      by O'Dea, L.S.
      Primary Genre Science Fiction
      The Janet Watson Chronicles 2 books
      by O'Dell, Claire
      Primary Genre Science Fiction
      Cassandrah Farbanks 3 books
      by O'Dell, Sonnet
      Primary Genre Paranormal Romance
      The Arlanian Trilogy 3 books
      by O'Doherty, Mark
      Primary Genre Fantasy
      The Journeys of McGill Feighan 4 books
      by O'Donnell, Kevin
      Primary Genre Science Fiction
      Tank & Fizz 4 books
      by O'Donnell, Liam
      Primary Genre Mystery
      Age Level Middle Grade (Ages 8-12)
      The Epic Erthelba 4 books
      by O'Donnell, Timothy R.
      Primary Genre Epic Fantasy
      Space Rocks! 2 books
      by O'Donnell, Tom
      Primary Genre Action Adventure
      Age Level Middle Grade (Ages 8-12)
      Gnomewrench 2 books
      by O'Donohoe, Nick
      Primary Genre Fantasy
      Healing 3 books
      by O'Donohoe, Nick
      Primary Genre Fantasy
      Tales of the Whosawhachits 3 books
      by O'Grady, Patricia
      Primary Genre Fantasy
      A Dark Brethren Novel 3 books
      by O'Hara, Tracey
      Primary Genre Urban Fantasy
      Pegasus 6 books
      by O'Hearn, Kate
      Primary Genre Fantasy
      Age Level Middle Grade (Ages 8-12)
      Shadow of the Dragon 2 books
      by O'Hearn, Kate
      Primary Genre Fantasy
      Age Level Middle Grade (Ages 8-12)
      Titans 3 books
      by O'Hearn, Kate
      Primary Genre Speculative Fiction
      Age Level Kids (12 & Under)
      Valkyrie 3 books
      by O'Hearn, Kate
      Primary Genre Fantasy
      Age Level Kids (12 & Under)
      The Newfoundland Vampire 3 books
      by O'Keefe, Charles
      Primary Genre Horror
      The Devoured Worlds 3 books
      by O'Keefe, Megan E.
      Primary Genre Space Opera
      The Protectorate 3 books
      by O'Keefe, Megan E.
      Primary Genre Science Fiction
      Sands of Aransa 3 books
      by O'Keefe, Megan E.
      Primary Genre Action Adventure, Epic Fantasy
      A Shawn Crawford Adventure 6 books
      by O'Leary, Tim
      Primary Genre Science Fiction
      Checquy Files 4 books
      by O'Malley, Daniel
      Primary Genre Speculative Fiction
      Starbridge 2 books
      by O'Malley, Kathleen
      Primary Genre Speculative Fiction
      Angel Crest 3 books
      by O'Neal, Chelsea
      Primary Genre Paranormal Romance
      Powers of Light 3 books
      by O'Neal, Kathleen M.
      Primary Genre Speculative Fiction
      A Doorway Back to Forever 6 books
      by O'Neal, Nanette
      Primary Genre Fantasy
      Age Level Young Adult (12-17)
      The Sim War 5 books
      by O'Neil, Henry V.
      Primary Genre Science Fiction
      Cal Wild Chronicles 4 books
      by O'Neill, Gene
      Primary Genre Speculative Fiction
      A World Invisible 3 books
      by O'Neill, Joanna
      Primary Genre Fantasy
      Mighty Mighty Monsters 17 books
      by O'Reilly, Sean
      Primary Genre Fantasy
      Age Level Chapter Books (Ages 7-10)
      Grumpy Old Wizards 5 books
      by O'Riley, John
      Primary Genre Fantasy
      The Winters Family Psi Chronicles 3 books
      by O'Riley, John
      Primary Genre Speculative Fiction
      Wizards of Seattle 2 books
      by O'Riley, John
      Primary Genre Fantasy
      Dissonance 2 books
      by O'Rourke, Erica
      Primary Genre Science Fiction
      Age Level Young Adult (12-17)
      Mo Fitzgerald 3 books
      by O'Rourke, Erica
      Primary Genre Fantasy
      Age Level Young Adult (12-17)
      Halloween 3 books
      by O'Rourke, Kelly
      Primary Genre Horror
      Age Level Young Adult (12-17)