The Puppet Masters: How MI6 Masterminded Ireland's Deepest State Crisis

David Burke uncovers the clandestine activities of Patrick Crinnion, a Garda intelligence officer who secretly served MI6 during the early years of the Troubles. As the Garda Síochána launched a manhunt for the Chief-of-Staff of the IRA, Crinnion found himself playing a crucial role in the effort to track him down.

Before his disappearance, Crinnion's actions exposed a web of secrets including those of another British spy in the Irish police, damaging intelligence leaks, gunrunning by Irish...