| Clongowes Wood : a history of Clongowes Wood College 1814-1989 | Costello, Peter | Monograph or Collective Volume | Gill & Macmillan | 1989 |
| Denis Guiney | Costello, Peter | Monograph or Collective Volume | University Colege Dublin Press, on behalf of the Historical Association of Ireland | 2008 |
| Dublin Castle in the life of the Irish nation | Costello, Peter | Monograph or Collective Volume | Wolfhound | 2000 |
| Dublin churches | Costello, Peter | Monograph or Collective Volume | Gill & Macmillan | 1989 |
| James Joyce : the years of growth, 1882-1915 : a biography | Costello, Peter | Monograph or Collective Volume | Kyle Cathie | 1992 |
| John Stanislaus Joyce : the voluminous life and genius of James Joyce's father | Costello, PeterJackson, John Wyse | Monograph or Collective Volume | Fourth Estate | 1997 |
| Land and Liam O'Flaherty | Costello, Peter | Article in Book | | 2000 |
| Liam O'Flaherty's Ireland | Costello, Peter | Monograph or Collective Volume | Wolfhound Press | 1996 |
| The heart grown brutal : the Irish revolution in literature from Parnell to the death of Yeats, 1891-1939 | Costello, Peter | Monograph or Collective Volume | Gill & Macmillan | 1977 |
| The very heart of the city : the story of Denis Guiney & Clerys | Costello, PeterFarmar, Tony | Monograph or Collective Volume | Clery and Co (1941) Ltd | 1992 |