Robert Harris, author of Conclave and many more, has returned to the Roman Empire for his next one and he joins Oliver with lessons from history for today. Agrippa by Robert Harris is in bookshops now.

<p>Robert Harris, author of Conclave and many more, has returned to the Roman Empire for his next one and he joins Oliver with lessons from history for today. Agrippa by Robert Harris is in bookshops now.</p>

Oliver Callan charms the nation with the best of entertainment, trending topics, sports, the arts and everything in between - all with a touch of craic.

<p>Oliver Callan charms the nation with the best of entertainment, trending topics, sports, the arts and everything in between - all with a touch of craic.</p>

Oliver Callan charms the mood of the nation, discusses trending topics, the latest in sport, the arts and everything that's hopping in Irish life! Listen live Monday to Friday at 9am on RTÉ Radio 1.