This week: David McCullagh on how the Anglo-Irish Treaty was undone; and Terry Prone on the art of communication in public life.

From Crown To Harp: How The Anglo-Irish Treaty Was Undone 1920-49

The Anglo-Irish Treaty of 1921 ended the War of Independence, and led to the creation of the Irish Free State the following year - a state still tied, in law, to the British Crown. But within sixteen years, that link had been almost entirely dismantled.

By the time Éamon de Valera introduced Bunreacht na hÉireann - the 1937 Constitution - Ireland was effectively a republic in everything but name. And just over a decade later, it became one in law as well.

A new book called From Crown to Harp: How the Anglo-Irish Treaty Was Undone 1920-49 traces this remarkable, bloodless revolution - exploring how Ireland quietly unpicked the Treaty settlement through law, diplomacy, and political will. The author is historian, author and broadcaster David McCullagh who joins Myles in studio. The book is published by Gill Books.

Terry Prone on her career in political communication

For decades, Terry Prone has been the person Irish public figures turned to when they needed to find the right words - or the right way to say them. Alongside her late husband Tom Savage and broadcaster Bunny Carr, she helped build Carr Communications, the country's first media training company.

Her new memoir, I'm Glad You Asked Me That: The Political Years. looks back on a life in political communication. It’s a life that brought her into close contact with figures like Charles Haughey, Garret FitzGerald, Pádraig Flynn, Albert Reynolds, Máire Geoghegan-Quinn, and many others - a front-row seat to how power, politics, and broadcasting evolved in modern Ireland.

Terry Prone joins Myles in studio. Her book is published by Red Stripe Press.