The Emerald Cancer

When Siobhan Corrigan's beloved father is murdered by Protestant para-military forces in Northern Ireland, her father's right hand man takes her alter ego Sandra and installs her with an English family to live the life of an English rose. Her role, to become a sleeper in the Terrorist Surveillance Unit run by one, Michael Forsythe and report back to Drago, the head of the Northern wing of the IRA.
After the Harrods bombing in central London and a terrible personal tragedy, Patrick Rutherford also sets out on a path of revenge. His recruitment to TSU the only conclusion. When the infiltration of TSU becomes apparent to Forsythe he engineers a risky plan using the outsourced asset, Patrick Rutherford, to infiltrate the Northern Wing of the IRA.
Patrick Rutherford and Siobhan Corrigan were created by circumstances beyond their control, manipulated by British Intelligence and the Northern wing of the IRA. Twisted and full of hate, they were brother and sister on opposite sides of the fence. Under certain circumstances each might kill the other but in most situations the invisible thread which bound them would prevent it. When they eventually meet the chemistry between the two of them is explosive with devastating, inexplicable consequences.