Featured Authors
Authors
= Author On Tour
- R O
- Irene O'Book
- Jane O'boyle
- Alexandra O'Brien
- Anne O'Brien
- Bob O'Brien
- Chris O'Brien
- Dan O'Brien
- Eileen O'brien
- Gail O'Brien
- John O'Brien
- Juliette O'Brien
- Kathleen O'Brien
- Kerry O'Brien
- Lucy O'Brien
- Maureen O'Brien
- Maureen O'Brien PhD
- Meg O'Brien
- Michael O'brien
- Steve O'Brien
- Laura O'Bryan
- Karyn O'Bryant
- Nicola O'Byrne
- Billy O'Callaghan
- Bishop O'Connell
- Catherine O'Connell
- James O'Connell
- Mark O'Connell
- Patricia O'Connell
- Robert L. O'Connell
- Timothy E. O'Connell
- Tyne O'Connell
- Anahad O'Connor
- Catherine O'Connor
- D'Arcy O'Connor
- Elaine O'Connor
- Flannery O'Connor
- Joe O'Connor
- Mary-Anne O'Connor
- Nuala O'Connor
- Sharon O'Connor
- Tracy O'Connor
- Claire O'Dell
- Elizabeth Lee O'Donnell
- Helen O'donnell
- James J. O'Donnell
- Jennifer O'Donnell
- Jodi O'Donnell
- Lawrence O'Donnell
- Lawrence O'Donnell Jr.
- Lawrence F. O'Donnell Jr.
- Lisa O'Donnell
- Tom O'Donnell
- John O'Donohue
- Maggie O'Farrell
- Zoe More O'Ferrall
- Mark O'Flynn
- Daniel O'Grady
- Kristina O'Grady
- Sarah Robb O'Hagan
- Bill O'hanlon
- Mary O'Hara
- Maryanne O'Hara
- Mo O'Hara
- Tracey O'Hara
- Denis O'Hare
- Sinéad O'Hart
- Dan O'Herlihy
- Maria Josefa O'Higgins
- Michael B. O'Higgins
- Alexandra O'Karma
- David O'Keefe
- Molly O'Keefe
- Jac O'Keeffe
- Kerry O'Keeffe