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	Mystery authors, surname starts with O		Books	Genres
	Andy Oakes	New Books	2	m
	Joyce Carol Oates	New Books	132	h, m, r, c
	Charles O'Brien	New Books	7	m
	Kevin O'Brien	New Books	8	m
	Martin O'Brien		5	m
	Maureen O'Brien		7	m
	Meg O'Brien		17	m, r
	Maxine O'Callaghan		15	h, m, r
	Thomas O'Callaghan		2	m
	Carol O'Connell	New Books	11	m
	Catherine O'Connell	New Books	2	m
	Jack O'Connell	New Books	6	m
	Gemma O'Connor		8	m
	Jane O'Connor		3	h, m
	Patrick O'Connor		21	m, t
	Tawni O'Dell	New Books	4	m
	Mel Odom	New Books	112	s, f, h, m, t
	Lillian O'Donnell		35	m
	Catherine O'Flynn	New Books	1	m, c
	Diana O'Hehir		11	m
	Leslie O'Kane		10	m
	Marc Olden		29	f, m
	Jenny Oldfield	New Books	168	f, h, m, t, r
	Pamela Oldfield	New Books	101	h, m, r
	Nick Oldham	New Books	11	m
	Susan Oleksiw		9	m
	B J Oliphant		7	m
	Maria-Antònia Oliver		2	m
	Gregg Olsen	New Books	10	m
	Karen E Olson	New Books	4	m
	Sister Carol Anne O'Marie		11	m
	Dorothy P O'Neill		10	m, r
	Gilda O'Neill	New Books	21	m, r
	Kenneth Oppel	New Books	23	f, m, t
	E Phillips Oppenheim		150	m, t
	Baroness Orczy	New Books	53	m, t
	A J Orde		6	m, t
	Roger Ormerod		49	m
	David Osborn		10	m, t
	Denise Osborne		6	m
	Liz Osborne		1	m
	Mary Pope Osborne	New Books	106	f, m
	Perri O'Shaughnessy	New Books	14	m
	Helen M Osterman		2	m
	Helen Macie Osterman		3	m
	Orland Outland		8	m
	Sonia Overall		2	m
	Charlie Owen	New Books	3	m
	Joanne Owen	New Books	1	m

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