He is best known for his coverage of the political and armed conflict in Northern Ireland, widely known as the Troubles, and for his investigation of Al Qaeda and Islamist extremism in the wake of 9/11.
Each book deals with the Northern Irish conflict from the perspective of one of the three main parties involved: the Provisional IRA; the various Ulster loyalist paramilitary groups; and the British government and security forces.
Taylor's books feature interviews with people connected to some of the most significant incidents and landmark political events in Northern Ireland during this time.
In 2000, Taylor presented the three part BBC2 series Brits on the covert war in Northern Ireland including interviews of former members of 14 Intelligence Company, the RUC Headquarters Mobile Support Unit and MI6.
In April 2012, he was presenter and reporter for the BBC2 two-part series Modern Spies, in which he interviewed serving members of MI5, the Secret Intelligence Service and GCHQ (anonymously).
Awarding Taylor his BAFTA, Sir Jeremy Isaacs described him as "Mr Valiant for the Truth", referencing John Bunyan's Pilgrim's Progress.