Publisher
- Palgrave Macmillan14
- Routledge12
- Prisoner Ombudsman for Northern Ireland10
- Northern Ireland Prison Service9
- Ministry of Justice8
- Criminal Justice Inspection Northern Ireland7
- [Dandy Booksellers Ltd]6
- Faber5
- Mainstream Digital5
- Anthem Press4
- HM Inspectorate of Prisons for Scotland4
- Pan4
- Policy Press4
- Bloomsbury Academic3
- Boldwood Books3
- Mainstream3
- Mainstream Publishing3
- Penguin Books3
- SAGE Publications Ltd3
- Springer3