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	Horror authors, surname starts with O		Books	Genres
	Joyce Carol Oates	New Books	147	h, m, r, c
	Angus Oblong		1	h
	Fitz-James O'Brien		9	s, h
	Maxine O'Callaghan		15	h, m, r
	Weston Ochse	New Books	11	h
	Mary O'Connell	New Books	1	s, f, h, m, t, r, c
	Flannery O'Connor		10	h
	Jane O'Connor	New Books	63	h, m
	Niamh O'Connor	New Books	6	f, h, m, t
	Mel Odom	New Books	128	s, f, h, m, t
	Elliott O'Donnell		32	h
	Charles Ogden		12	f, h
	Kei Ohishi		1	h, c
	Bernard O'Keane		1	h
	Hiroya Oku	New Books	23	s, f, h
	Johan Olander		2	f, h
	Susan Olasky		10	s, f, h, m, t, r, c
	Jenny Oldfield	New Books	179	f, h, m, t, r
	Pamela Oldfield	New Books	110	h, m, r
	Sibylle Von Olfers		7	s, f, h, m, t, r
	Howard Olgin		6	h, m, t
	Sean Olin	New Books	2	h, m, t
	Mrs Oliphant	New Books	37	h, c
	Chad Oliver		12	h
	Gloria Oliver		5	s, f, h
	Jonathan Oliver	New Books	3	h
	Michael Oliveri		3	h
	Lance Olsen		19	h, c
	Stewart O'Nan	New Books	18	h, t, c
	Anthony O'Neill		3	h
	Gene O'Neill		9	h
	Oliver Onions		29	h
	David Oppegaard		3	h
	Marie O'Regan	New Books	5	h
	Sean O'Reilly		4	f, h, r, c
	Robert O'Riordan		3	s, h
	Michael O'Rourke		3	h
	Monica J O'Rourke		6	h
	George Orwell		64	s, h, c
	Joanne Van Os		4	s, f, h, m, t, r
	Juanita Tyree Osborne		26	h, r
	William Osborne	New Books	1	s, f, h, m, t, r, c
	Jesse Osburn		8	h
	Darren O'Shaughnessy		2	h, t
	Claudia Osmond	New Books	1	s, f, h, m, t, r, c
	Vincent O'Sullivan	New Books	14	h, c
	Ariana Overton		5	h, m, t
	Max Overton		7	s, f, h, m, t, c
	Everett Owens		4	h

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