This week: Two centuries of forced disappearance in Ireland; We visit the Princess Grace Irish Library in Monaco; and Ronan Kelly with twin tales from our island communities.

Two Centuries of Disappearances in Ireland

For centuries, 'forced disappearances' have been part of violent political conflict in Ireland. Those forced disappearances, as defined by International Human Rights Law, involve the execution of enemy combatants, political opponents or civilians, and the hiding of their bodies for a political or military purpose. Usually this is achieved by secretly burying the victims in remote or inaccessible locations.

A new book looks at the history of this practice in Ireland, and identifies all known victims over the last century, from the North King Street Massacre in 1916 right up to 2003. Behind each of those disappearances is the story of a life cut short and of a family left searching for answers.

That book, The Disappeared: Forced Disappearances in Ireland, 1798-1998, is written by historian Dr Pádraig Óg Ó Ruairc, who joins Myles to discuss this controversial and often harrowing topic The book is published by Merrion Press.

The Princess Grace Irish Library

High up on a rocky outcrop, overlooking the principality of Monaco, sits a small oasis of Irish culture: The Princess Grace Irish Library. Named for Grace Kelly, the iconic American actress turned royal luminary, it was founded in 1984 by Prince Rainier - as a tribute to his late wife, and her enduring attachment to Ireland.

Grace had roots in County Mayo, where her paternal grandfather was born. This royal couple, and their children – Princess Caroline, and Prince Albert – made a state visit to Ireland in 1961. To mark the 40th anniversary of the library, Flor MacCarthy (who was Writer-in-Residence there last month) brought us this report, in which she speaks to the current monarch, Prince Albert II, about his family's determination to nurture cultural links between Ireland and Monaco.

Flor also speaks to Thomas Fouilleron, Director of the Archives and Library at the Prince's Palace; Paula Farquharson, Director of the Princess Grace Irish Library; and Géraldine Lance who also works at the library. We also hear radio coverage of the 1961 Visit from the RTÉ Radio Archives.

Long Island, Coney Island

Finally tonight - Ronan Kelly has been island-hopping – and he encountered two men with an eye for potential that's hiding in plain sight. These twin tales of creativity and resourcefulness take place in Long Island and Coney Island in Roaringwater Bay, West Cork.