| A history of the Linen Hall Library, 1788-1988 | Killen, John | Monograph or Collective Volume | | 1990 |
| An index to the Microscope (1799-1800) and the Belfast Library Journal (1816) | Killen, John | Monograph or Collective Volume | Linen Hall Library | 1995 |
| Dear Mr McLaverty : the literary correspondence of John McGahern and Michael McLaverty, 1959-1980 | McGahern, John, 1934-2006McLaverty, Michael, 1904-1992 | Monograph or Collective Volume | Linen Hall Library | 2006 |
| John Bull's famous circus : Ulster history through the postcard, 1905-1985 | Killen, John | Monograph or Collective Volume | O'Brien | 1985 |
| John Templeton - the Gilbert White of Ireland and friend of everyman | Killen, John | Article in Journal | | 1992 |
| John Templeton, the Linen Hall Library and the preservation of Irish music | Killen, John | Article in Book | | 1996 |
| New republican postcards | Killen, John | Article in Journal | | 1980 |
| The decade of the United Irishmen : contemporary accounts 1791-1801 | | Monograph or Collective Volume | Blackstaff Press | 1997 |
| The famine decade : contemporary accounts 1841-1851 | | Monograph or Collective Volume | Blackstaff Press | 1995 |
| The genealogical collection in the Linen Hall Library, Belfast, being the text of a talk delivered to the first Irish genealogical conference at Trinity College, Dublin | Killen, John | Article in Journal | | 1992 |
| The reading habits of a Georgian gentleman, John Templeton, and the book collections of the Belfast Society for Promoting Knowledge | Killen, John | Article in Book | | 1999 |
| The St Patrick's Treasury | Killen, John | Monograph or Collective Volume | Blackstaff Press | 2018 |
| The unkindest cut : a cartoon history of Ulster, 1900-2000 | Killen, John | Monograph or Collective Volume | Blackstaff Press | 2000 |